Passwordless (#292)

* add two rpcs to User service:
	- Passwordless: endpoint that receives an email, topic and an optional message
	- PasswordlessML: endpoint that receives token and topic via MagicLink.

* Proposal to add Passwordless login feature to the endpoint user.

* remove currency run check

* Commit from GitHub Actions (Publish APIs & Clients)

* Create downstream.yml

* Commit from GitHub Actions (Publish APIs & Clients)

* update todo

* Commit from GitHub Actions (Publish APIs & Clients)

* Update publish.yml

* Commit from GitHub Actions (Publish APIs & Clients)

* Update publish.yml

* Commit from GitHub Actions (Publish APIs & Clients)

* Update and rename publish.yml to generate.yml

* Update generate.yml

* Commit from GitHub Actions (Generate Clients & Examples)

* Commit from GitHub Actions (Generate Clients & Examples)

* add comments

* Commit from GitHub Actions (Generate Clients & Examples)

* move otp to auth category

* charge for user verification

* Commit from GitHub Actions (Generate Clients & Examples)

* Update user.proto

* Commit from GitHub Actions (Generate Clients & Examples)

* Commit from GitHub Actions (Generate Clients & Examples)

* Change js client git repo url (#249)

* Commit from GitHub Actions (Generate Clients & Examples)

* use tableName func for Count

* Commit from GitHub Actions (Generate Clients & Examples)

* update notes example

* Commit from GitHub Actions (Generate Clients & Examples)

* Update .gitignore

* Update .gitignore

* Commit from GitHub Actions (Generate Clients & Examples)

* add new endpoints SendMagicLink and VerifyToken to M3O user serivce

Signed-off-by: Daniel Joudat <danieljoudat@gmail.com>

* Update user.proto

* add examples to examples.json | convert isvalid to is_valid | add some extra comments in user.proto

Signed-off-by: Daniel Joudat <danieljoudat@gmail.com>

Co-authored-by: Asim Aslam <asim@aslam.me>
Co-authored-by: asim <asim@users.noreply.github.com>
Co-authored-by: Janos Dobronszki <dobronszki@gmail.com>
Co-authored-by: crufter <crufter@users.noreply.github.com>

user/domain/domain.go

@@ -6,13 +6,16 @@ import (
 	"errors"
 	"fmt"
 	"net/url"
+	"path"
 	"strings"
 	"time"
 
 	_struct "github.com/golang/protobuf/ptypes/struct"
 	"github.com/micro/micro/v3/service/config"
+	microerr "github.com/micro/micro/v3/service/errors"
 	"github.com/micro/micro/v3/service/logger"
 	db "github.com/micro/services/db/proto"
+	"github.com/micro/services/pkg/cache"
 	user "github.com/micro/services/user/proto"
 
 	"github.com/sendgrid/sendgrid-go"
@@ -463,3 +466,57 @@ func (domain *Domain) List(ctx context.Context, o, l int32) ([]*user.Account, er
 	}
 	return ret, nil
 }
+
+func (domain *Domain) CacheToken(ctx context.Context, token, id, email string, ttl int) error {
+	obj := &tokenObject{
+		Id:    id,
+		Email: email,
+	}
+
+	expires := time.Now().Add(time.Duration(ttl) * time.Second)
+
+	err := cache.Context(ctx).Set(token, obj, expires)
+
+	return err
+}
+
+func (domain *Domain) SendMLE(fromName, toAddress, toUsername, subject, textContent, token, address, endpoint string) error {
+	if domain.sengridKey == "" {
+		return fmt.Errorf("empty email api key")
+	}
+	from := mail.NewEmail(fromName, "support@m3o.com")
+	to := mail.NewEmail(toUsername, toAddress)
+	textContent = strings.Replace(textContent, "$micro_verification_link", fmt.Sprint("https://", path.Join(address, endpoint, token)), -1)
+	message := mail.NewSingleEmail(from, subject, to, textContent, "")
+	client := sendgrid.NewSendClient(domain.sengridKey)
+	response, err := client.Send(message)
+	logger.Info(response)
+
+	return err
+}
+
+func (domain *Domain) CacheReadToken(ctx context.Context, token string) (string, string, error) {
+
+	if token == "" {
+		return "", "", errors.New("token empty")
+	}
+
+	var obj tokenObject
+
+	expires, err := cache.Context(ctx).Get(token, obj)
+
+	if err == cache.ErrNotFound {
+		return "", "", errors.New("token not found")
+	} else if time.Until(expires).Seconds() < 0 {
+		return "", "", errors.New("token expired")
+	} else if err != nil {
+		return "", "", microerr.InternalServerError("CacheReadToken", err.Error())
+	}
+
+	return obj.Id, obj.Email, nil
+}
+
+type tokenObject struct {
+	Id    string
+	Email string
+}

user/examples.json

@@ -226,5 +226,40 @@
         ]
       }
     }
+  ],
+  "sendMagicLink": [
+    {
+      "title": "Send a MagicLink",
+      "run_check": false,
+      "request": {
+        "email": "joe@example.com",
+        "subject": "MagicLink to access your account",
+        "textContent": "Hi there,\n\nClick here to access your account $micro_verification_link",
+        "fromName": "Awesome Dot Com",
+        "address": "www.example.com",
+        "endpoint": "verifytoken"
+      },
+      "response": {
+        "session": {
+          "id": "df91a612-5b24-4634-99ff-240220ab8f55",
+          "created": "1623677579",
+          "expires": "1623699579",
+          "userId": "8b98acbe-0b6a-4d66-a414-5ffbf666786f"
+        }
+      }
+    }
+  ],
+  "verifyToken": [
+    {
+      "title": "Verify a Token",
+      "run_check": false,
+      "request": {
+        "token": "EdsUiidouJJJLldjlloofUiorkojflsWWdld"
+      },
+      "response": {
+        "is_valid": false,
+        "message": ""
+      }
+    }
   ]
 }

user/handler/handler.go

@@ -4,15 +4,20 @@ import (
 	goctx "context"
 	"crypto/rand"
 	"encoding/base64"
+	"encoding/json"
 	"fmt"
+	"path"
 	"regexp"
 	"strings"
 	"time"
 
+	"github.com/asim/mq/broker"
 	"github.com/google/uuid"
 	"github.com/micro/micro/v3/service/errors"
+	"github.com/micro/micro/v3/service/logger"
 	db "github.com/micro/services/db/proto"
 	otp "github.com/micro/services/otp/proto"
+	"github.com/micro/services/pkg/tenant"
 	"github.com/micro/services/user/domain"
 	pb "github.com/micro/services/user/proto"
 	"golang.org/x/crypto/bcrypt"
@@ -257,6 +262,10 @@ func (s *User) VerifyEmail(ctx context.Context, req *pb.VerifyEmailRequest, rsp
 
 	// mark user as verified
 	user, err := s.domain.Read(ctx, userId)
+	if err != nil {
+		return err
+	}
+
 	user.Verified = true
 
 	// update the user
@@ -391,3 +400,145 @@ func (s *User) List(ctx goctx.Context, request *pb.ListRequest, response *pb.Lis
 	}
 	return nil
 }
+
+func (s *User) SendMagicLink(ctx context.Context, req *pb.SendMagicLinkRequest, stream pb.User_SendMagicLinkStream) error {
+	// check if the email has the correct format
+	if !emailFormat.MatchString(req.Email) {
+		return errors.BadRequest("SendMagicLink.email-format-check", "email has wrong format")
+	}
+
+	// check if the email exist in the DB
+	users, err := s.domain.Search(ctx, "", req.Email)
+	if err.Error() == "not found" {
+		return errors.BadRequest("SendMagicLink.email-check", "email doesn't exist")
+	} else if err != nil {
+		return errors.BadRequest("SendMagicLink.email-check", err.Error())
+	}
+
+	// create a token object
+	token := random(128)
+
+	// set ttl to 60 seconds
+	ttl := 60
+
+	// uuid part of the topic
+	topic := uuid.New().String()
+
+	// save token, so we can retrieve it later
+	err = s.domain.CacheToken(ctx, token, topic, req.Email, ttl)
+	if err != nil {
+		return errors.BadRequest("SendMagicLink.cacheToken", "Oooops something went wrong")
+	}
+
+	// send magic link to email address
+	err = s.domain.SendMLE(req.FromName, req.Email, users[0].Username, req.Subject, req.TextContent, token, req.Address, req.Endpoint)
+	if err != nil {
+		return errors.BadRequest("SendMagicLink.sendEmail", "Oooops something went wrong")
+	}
+
+	// subscribe to the topic
+	id, ok := tenant.FromContext(ctx)
+	if !ok {
+		id = "default"
+	}
+
+	// create tenant based topics
+	topic = path.Join("stream", id, topic)
+
+	logger.Infof("Tenant %v subscribing to %v\n", id, topic)
+
+	sub, err := broker.Subscribe(topic)
+	if err != nil {
+		return errors.InternalServerError("SendMagicLink.subscribe", "failed to subscribe to topic")
+	}
+	defer broker.Unsubscribe(topic, sub)
+
+	// range over the messages until the subscriber is closed
+	for msg := range sub {
+		// unmarshal the message into a struct
+		s := &pb.Session{}
+		err = json.Unmarshal(msg, s)
+		if err != nil {
+			return errors.InternalServerError("SendMgicLink.unmarshal", "faild to unmarshal the message")
+		}
+
+		if err := stream.Send(&pb.SendMagicLinkResponse{
+			Session: s,
+		}); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *User) VerifyToken(ctx context.Context, req *pb.VerifyTokenRequest, rsp *pb.VerifyTokenResponse) error {
+	// extract token
+	token := req.Token
+
+	// check if token is valid
+	topic, email, err := s.domain.CacheReadToken(ctx, token)
+	if err.Error() == "token not found" {
+		rsp.IsValid = false
+		rsp.Message = err.Error()
+		return nil
+	} else if err.Error() == "token expired" {
+		rsp.IsValid = false
+		rsp.Message = err.Error()
+		return nil
+	} else if err.Error() == "token empty" {
+		rsp.IsValid = false
+		rsp.Message = err.Error()
+		return nil
+	} else if err != nil {
+		return errors.BadRequest("VerifyToken.CacheReadToken", err.Error())
+	}
+
+	// save session
+	accounts, err := s.domain.Search(ctx, "", email)
+	if err != nil {
+		return err
+	}
+	if len(accounts) == 0 {
+		rsp.IsValid = false
+		rsp.Message = "account not found"
+		return nil
+	}
+
+	sess := &pb.Session{
+		Id:      random(128),
+		Created: time.Now().Unix(),
+		Expires: time.Now().Add(time.Hour * 24 * 7).Unix(),
+		UserId:  accounts[0].Id,
+	}
+
+	if err := s.domain.CreateSession(ctx, sess); err != nil {
+		return errors.InternalServerError("VerifyToken.createSession", err.Error())
+	}
+
+	// publish a message which holds the session value.
+	// get the tenant
+	id, ok := tenant.FromContext(ctx)
+	if !ok {
+		id = "default"
+	}
+
+	// create tenant based topics
+	topic = path.Join("stream", id, topic)
+
+	// marshal the data
+	b, _ := json.Marshal(sess)
+
+	logger.Infof("Tenant %v publishing to %v\n", id, topic)
+
+	// publish the message
+	err = broker.Publish(topic, b)
+	if err != nil {
+		return errors.InternalServerError("VerifyToken.publish", "Ooops something went wrong, please try again")
+	}
+
+	rsp.IsValid = true
+	rsp.Message = ""
+
+	return nil
+}

user/proto/user.pb.go

@@ -1,7 +1,7 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.26.0
+// 	protoc-gen-go v1.27.1
-// 	protoc        v3.15.5
+// 	protoc        v3.18.1
 // source: proto/user.proto
 
 package user
@@ -1523,7 +1523,7 @@ func (*ResetPasswordResponse) Descriptor() ([]byte, []int) {
 	return file_proto_user_proto_rawDescGZIP(), []int{25}
 }
 
-// List all users
+// List all users. Returns a paged list of results
 type ListRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1628,6 +1628,255 @@ func (x *ListResponse) GetUsers() []*Account {
 	return nil
 }
 
+// Login using email only - Passwordless
+type SendMagicLinkRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// the email address of the user
+	Email   string `protobuf:"bytes,1,opt,name=email,proto3" json:"email,omitempty"`
+	Subject string `protobuf:"bytes,2,opt,name=subject,proto3" json:"subject,omitempty"`
+	// Text content of the email. Don't forget to include the string '$micro_verification_link' which will be replaced by the real verification link
+	// HTML emails are not available currently.
+	TextContent string `protobuf:"bytes,3,opt,name=textContent,proto3" json:"textContent,omitempty"`
+	// Display name of the sender for the email. Note: the email address will still be 'support@m3o.com'
+	FromName string `protobuf:"bytes,4,opt,name=fromName,proto3" json:"fromName,omitempty"`
+	// Your web site address, example www.example.com or user.example.com
+	Address string `protobuf:"bytes,5,opt,name=address,proto3" json:"address,omitempty"`
+	// Endpoint name where your http request handler handles MagicLink by
+	// calling M3O VerifyToken endpoint. You can return as a result a success,
+	// failed or redirect to another page.
+	Endpoint string `protobuf:"bytes,6,opt,name=endpoint,proto3" json:"endpoint,omitempty"`
+}
+
+func (x *SendMagicLinkRequest) Reset() {
+	*x = SendMagicLinkRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_user_proto_msgTypes[28]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *SendMagicLinkRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SendMagicLinkRequest) ProtoMessage() {}
+
+func (x *SendMagicLinkRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_user_proto_msgTypes[28]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use SendMagicLinkRequest.ProtoReflect.Descriptor instead.
+func (*SendMagicLinkRequest) Descriptor() ([]byte, []int) {
+	return file_proto_user_proto_rawDescGZIP(), []int{28}
+}
+
+func (x *SendMagicLinkRequest) GetEmail() string {
+	if x != nil {
+		return x.Email
+	}
+	return ""
+}
+
+func (x *SendMagicLinkRequest) GetSubject() string {
+	if x != nil {
+		return x.Subject
+	}
+	return ""
+}
+
+func (x *SendMagicLinkRequest) GetTextContent() string {
+	if x != nil {
+		return x.TextContent
+	}
+	return ""
+}
+
+func (x *SendMagicLinkRequest) GetFromName() string {
+	if x != nil {
+		return x.FromName
+	}
+	return ""
+}
+
+func (x *SendMagicLinkRequest) GetAddress() string {
+	if x != nil {
+		return x.Address
+	}
+	return ""
+}
+
+func (x *SendMagicLinkRequest) GetEndpoint() string {
+	if x != nil {
+		return x.Endpoint
+	}
+	return ""
+}
+
+type SendMagicLinkResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Session *Session `protobuf:"bytes,1,opt,name=session,proto3" json:"session,omitempty"`
+}
+
+func (x *SendMagicLinkResponse) Reset() {
+	*x = SendMagicLinkResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_user_proto_msgTypes[29]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *SendMagicLinkResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*SendMagicLinkResponse) ProtoMessage() {}
+
+func (x *SendMagicLinkResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_user_proto_msgTypes[29]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use SendMagicLinkResponse.ProtoReflect.Descriptor instead.
+func (*SendMagicLinkResponse) Descriptor() ([]byte, []int) {
+	return file_proto_user_proto_rawDescGZIP(), []int{29}
+}
+
+func (x *SendMagicLinkResponse) GetSession() *Session {
+	if x != nil {
+		return x.Session
+	}
+	return nil
+}
+
+// Check whether the token attached to MagicLink is valid or not.
+// Ideally, you need to call this endpoint from your http request
+// handler that handles the endpoint which is specified in the
+// SendMagicLink request.
+type VerifyTokenRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Token string `protobuf:"bytes,1,opt,name=token,proto3" json:"token,omitempty"`
+}
+
+func (x *VerifyTokenRequest) Reset() {
+	*x = VerifyTokenRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_user_proto_msgTypes[30]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *VerifyTokenRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*VerifyTokenRequest) ProtoMessage() {}
+
+func (x *VerifyTokenRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_user_proto_msgTypes[30]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use VerifyTokenRequest.ProtoReflect.Descriptor instead.
+func (*VerifyTokenRequest) Descriptor() ([]byte, []int) {
+	return file_proto_user_proto_rawDescGZIP(), []int{30}
+}
+
+func (x *VerifyTokenRequest) GetToken() string {
+	if x != nil {
+		return x.Token
+	}
+	return ""
+}
+
+type VerifyTokenResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	IsValid bool   `protobuf:"varint,1,opt,name=is_valid,json=isValid,proto3" json:"is_valid,omitempty"`
+	Message string `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty"`
+}
+
+func (x *VerifyTokenResponse) Reset() {
+	*x = VerifyTokenResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_user_proto_msgTypes[31]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *VerifyTokenResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*VerifyTokenResponse) ProtoMessage() {}
+
+func (x *VerifyTokenResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_user_proto_msgTypes[31]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use VerifyTokenResponse.ProtoReflect.Descriptor instead.
+func (*VerifyTokenResponse) Descriptor() ([]byte, []int) {
+	return file_proto_user_proto_rawDescGZIP(), []int{31}
+}
+
+func (x *VerifyTokenResponse) GetIsValid() bool {
+	if x != nil {
+		return x.IsValid
+	}
+	return false
+}
+
+func (x *VerifyTokenResponse) GetMessage() string {
+	if x != nil {
+		return x.Message
+	}
+	return ""
+}
+
 var File_proto_user_proto protoreflect.FileDescriptor
 
 var file_proto_user_proto_rawDesc = []byte{
@@ -1785,63 +2034,96 @@ var file_proto_user_proto_rawDesc = []byte{
 	0x6d, 0x69, 0x74, 0x22, 0x33, 0x0a, 0x0c, 0x4c, 0x69, 0x73, 0x74, 0x52, 0x65, 0x73, 0x70, 0x6f,
 	0x6e, 0x73, 0x65, 0x12, 0x23, 0x0a, 0x05, 0x75, 0x73, 0x65, 0x72, 0x73, 0x18, 0x01, 0x20, 0x03,
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+	0x74, 0x52, 0x05, 0x75, 0x73, 0x65, 0x72, 0x73, 0x22, 0xba, 0x01, 0x0a, 0x14, 0x53, 0x65, 0x6e,
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+	0x64, 0x4d, 0x61, 0x67, 0x69, 0x63, 0x4c, 0x69, 0x6e, 0x6b, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73,
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+	0x74, 0x12, 0x14, 0x0a, 0x05, 0x65, 0x6d, 0x61, 0x69, 0x6c, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09,
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+	0x52, 0x05, 0x65, 0x6d, 0x61, 0x69, 0x6c, 0x12, 0x18, 0x0a, 0x07, 0x73, 0x75, 0x62, 0x6a, 0x65,
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+	0x63, 0x74, 0x18, 0x02, 0x20, 0x01, 0x28, 0x09, 0x52, 0x07, 0x73, 0x75, 0x62, 0x6a, 0x65, 0x63,
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+	0x73, 0x73, 0x77, 0x6f, 0x72, 0x64, 0x52, 0x65, 0x73, 0x65, 0x74, 0x45, 0x6d, 0x61, 0x69, 0x6c,
+	0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x24, 0x2e, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x53,
+	0x65, 0x6e, 0x64, 0x50, 0x61, 0x73, 0x73, 0x77, 0x6f, 0x72, 0x64, 0x52, 0x65, 0x73, 0x65, 0x74,
+	0x45, 0x6d, 0x61, 0x69, 0x6c, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x12,
+	0x4a, 0x0a, 0x0d, 0x52, 0x65, 0x73, 0x65, 0x74, 0x50, 0x61, 0x73, 0x73, 0x77, 0x6f, 0x72, 0x64,
+	0x12, 0x1a, 0x2e, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x52, 0x65, 0x73, 0x65, 0x74, 0x50, 0x61, 0x73,
+	0x73, 0x77, 0x6f, 0x72, 0x64, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x1b, 0x2e, 0x75,
+	0x73, 0x65, 0x72, 0x2e, 0x52, 0x65, 0x73, 0x65, 0x74, 0x50, 0x61, 0x73, 0x73, 0x77, 0x6f, 0x72,
+	0x64, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x12, 0x2f, 0x0a, 0x04, 0x4c,
+	0x69, 0x73, 0x74, 0x12, 0x11, 0x2e, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x4c, 0x69, 0x73, 0x74, 0x52,
+	0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x12, 0x2e, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x4c, 0x69,
+	0x73, 0x74, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x12, 0x4c, 0x0a, 0x0d,
+	0x53, 0x65, 0x6e, 0x64, 0x4d, 0x61, 0x67, 0x69, 0x63, 0x4c, 0x69, 0x6e, 0x6b, 0x12, 0x1a, 0x2e,
+	0x75, 0x73, 0x65, 0x72, 0x2e, 0x53, 0x65, 0x6e, 0x64, 0x4d, 0x61, 0x67, 0x69, 0x63, 0x4c, 0x69,
+	0x6e, 0x6b, 0x52, 0x65, 0x71, 0x75, 0x65, 0x73, 0x74, 0x1a, 0x1b, 0x2e, 0x75, 0x73, 0x65, 0x72,
+	0x2e, 0x53, 0x65, 0x6e, 0x64, 0x4d, 0x61, 0x67, 0x69, 0x63, 0x4c, 0x69, 0x6e, 0x6b, 0x52, 0x65,
+	0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00, 0x30, 0x01, 0x12, 0x44, 0x0a, 0x0b, 0x56, 0x65,
+	0x72, 0x69, 0x66, 0x79, 0x54, 0x6f, 0x6b, 0x65, 0x6e, 0x12, 0x18, 0x2e, 0x75, 0x73, 0x65, 0x72,
+	0x2e, 0x56, 0x65, 0x72, 0x69, 0x66, 0x79, 0x54, 0x6f, 0x6b, 0x65, 0x6e, 0x52, 0x65, 0x71, 0x75,
+	0x65, 0x73, 0x74, 0x1a, 0x19, 0x2e, 0x75, 0x73, 0x65, 0x72, 0x2e, 0x56, 0x65, 0x72, 0x69, 0x66,
+	0x79, 0x54, 0x6f, 0x6b, 0x65, 0x6e, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x22, 0x00,
+	0x42, 0x0e, 0x5a, 0x0c, 0x2e, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x3b, 0x75, 0x73, 0x65, 0x72,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -1856,7 +2138,7 @@ func file_proto_user_proto_rawDescGZIP() []byte {
 	return file_proto_user_proto_rawDescData
 }
 
-var file_proto_user_proto_msgTypes = make([]protoimpl.MessageInfo, 31)
+var file_proto_user_proto_msgTypes = make([]protoimpl.MessageInfo, 35)
 var file_proto_user_proto_goTypes = []interface{}{
 	(*Account)(nil),                        // 0: user.Account
 	(*Session)(nil),                        // 1: user.Session
@@ -1886,50 +2168,59 @@ var file_proto_user_proto_goTypes = []interface{}{
 	(*ResetPasswordResponse)(nil),          // 25: user.ResetPasswordResponse
 	(*ListRequest)(nil),                    // 26: user.ListRequest
 	(*ListResponse)(nil),                   // 27: user.ListResponse
-	nil,                                    // 28: user.Account.ProfileEntry
+	(*SendMagicLinkRequest)(nil),           // 28: user.SendMagicLinkRequest
-	nil,                                    // 29: user.CreateRequest.ProfileEntry
+	(*SendMagicLinkResponse)(nil),          // 29: user.SendMagicLinkResponse
-	nil,                                    // 30: user.UpdateRequest.ProfileEntry
+	(*VerifyTokenRequest)(nil),             // 30: user.VerifyTokenRequest
+	(*VerifyTokenResponse)(nil),            // 31: user.VerifyTokenResponse
+	nil,                                    // 32: user.Account.ProfileEntry
+	nil,                                    // 33: user.CreateRequest.ProfileEntry
+	nil,                                    // 34: user.UpdateRequest.ProfileEntry
 }
 var file_proto_user_proto_depIdxs = []int32{
-	28, // 0: user.Account.profile:type_name -> user.Account.ProfileEntry
+	32, // 0: user.Account.profile:type_name -> user.Account.ProfileEntry
-	29, // 1: user.CreateRequest.profile:type_name -> user.CreateRequest.ProfileEntry
+	33, // 1: user.CreateRequest.profile:type_name -> user.CreateRequest.ProfileEntry
 	0,  // 2: user.CreateResponse.account:type_name -> user.Account
 	0,  // 3: user.ReadResponse.account:type_name -> user.Account
-	30, // 4: user.UpdateRequest.profile:type_name -> user.UpdateRequest.ProfileEntry
+	34, // 4: user.UpdateRequest.profile:type_name -> user.UpdateRequest.ProfileEntry
 	1,  // 5: user.ReadSessionResponse.session:type_name -> user.Session
 	1,  // 6: user.LoginResponse.session:type_name -> user.Session
 	0,  // 7: user.ListResponse.users:type_name -> user.Account
-	2,  // 8: user.User.Create:input_type -> user.CreateRequest
+	1,  // 8: user.SendMagicLinkResponse.session:type_name -> user.Session
-	6,  // 9: user.User.Read:input_type -> user.ReadRequest
+	2,  // 9: user.User.Create:input_type -> user.CreateRequest
-	8,  // 10: user.User.Update:input_type -> user.UpdateRequest
+	6,  // 10: user.User.Read:input_type -> user.ReadRequest
-	4,  // 11: user.User.Delete:input_type -> user.DeleteRequest
+	8,  // 11: user.User.Update:input_type -> user.UpdateRequest
-	10, // 12: user.User.UpdatePassword:input_type -> user.UpdatePasswordRequest
+	4,  // 12: user.User.Delete:input_type -> user.DeleteRequest
-	14, // 13: user.User.Login:input_type -> user.LoginRequest
+	10, // 13: user.User.UpdatePassword:input_type -> user.UpdatePasswordRequest
-	16, // 14: user.User.Logout:input_type -> user.LogoutRequest
+	14, // 14: user.User.Login:input_type -> user.LoginRequest
-	12, // 15: user.User.ReadSession:input_type -> user.ReadSessionRequest
+	16, // 15: user.User.Logout:input_type -> user.LogoutRequest
-	18, // 16: user.User.VerifyEmail:input_type -> user.VerifyEmailRequest
+	12, // 16: user.User.ReadSession:input_type -> user.ReadSessionRequest
-	20, // 17: user.User.SendVerificationEmail:input_type -> user.SendVerificationEmailRequest
+	18, // 17: user.User.VerifyEmail:input_type -> user.VerifyEmailRequest
-	22, // 18: user.User.SendPasswordResetEmail:input_type -> user.SendPasswordResetEmailRequest
+	20, // 18: user.User.SendVerificationEmail:input_type -> user.SendVerificationEmailRequest
-	24, // 19: user.User.ResetPassword:input_type -> user.ResetPasswordRequest
+	22, // 19: user.User.SendPasswordResetEmail:input_type -> user.SendPasswordResetEmailRequest
-	26, // 20: user.User.List:input_type -> user.ListRequest
+	24, // 20: user.User.ResetPassword:input_type -> user.ResetPasswordRequest
-	3,  // 21: user.User.Create:output_type -> user.CreateResponse
+	26, // 21: user.User.List:input_type -> user.ListRequest
-	7,  // 22: user.User.Read:output_type -> user.ReadResponse
+	28, // 22: user.User.SendMagicLink:input_type -> user.SendMagicLinkRequest
-	9,  // 23: user.User.Update:output_type -> user.UpdateResponse
+	30, // 23: user.User.VerifyToken:input_type -> user.VerifyTokenRequest
-	5,  // 24: user.User.Delete:output_type -> user.DeleteResponse
+	3,  // 24: user.User.Create:output_type -> user.CreateResponse
-	11, // 25: user.User.UpdatePassword:output_type -> user.UpdatePasswordResponse
+	7,  // 25: user.User.Read:output_type -> user.ReadResponse
-	15, // 26: user.User.Login:output_type -> user.LoginResponse
+	9,  // 26: user.User.Update:output_type -> user.UpdateResponse
-	17, // 27: user.User.Logout:output_type -> user.LogoutResponse
+	5,  // 27: user.User.Delete:output_type -> user.DeleteResponse
-	13, // 28: user.User.ReadSession:output_type -> user.ReadSessionResponse
+	11, // 28: user.User.UpdatePassword:output_type -> user.UpdatePasswordResponse
-	19, // 29: user.User.VerifyEmail:output_type -> user.VerifyEmailResponse
+	15, // 29: user.User.Login:output_type -> user.LoginResponse
-	21, // 30: user.User.SendVerificationEmail:output_type -> user.SendVerificationEmailResponse
+	17, // 30: user.User.Logout:output_type -> user.LogoutResponse
-	23, // 31: user.User.SendPasswordResetEmail:output_type -> user.SendPasswordResetEmailResponse
+	13, // 31: user.User.ReadSession:output_type -> user.ReadSessionResponse
-	25, // 32: user.User.ResetPassword:output_type -> user.ResetPasswordResponse
+	19, // 32: user.User.VerifyEmail:output_type -> user.VerifyEmailResponse
-	27, // 33: user.User.List:output_type -> user.ListResponse
+	21, // 33: user.User.SendVerificationEmail:output_type -> user.SendVerificationEmailResponse
-	21, // [21:34] is the sub-list for method output_type
+	23, // 34: user.User.SendPasswordResetEmail:output_type -> user.SendPasswordResetEmailResponse
-	8,  // [8:21] is the sub-list for method input_type
+	25, // 35: user.User.ResetPassword:output_type -> user.ResetPasswordResponse
-	8,  // [8:8] is the sub-list for extension type_name
+	27, // 36: user.User.List:output_type -> user.ListResponse
-	8,  // [8:8] is the sub-list for extension extendee
+	29, // 37: user.User.SendMagicLink:output_type -> user.SendMagicLinkResponse
-	0,  // [0:8] is the sub-list for field type_name
+	31, // 38: user.User.VerifyToken:output_type -> user.VerifyTokenResponse
+	24, // [24:39] is the sub-list for method output_type
+	9,  // [9:24] is the sub-list for method input_type
+	9,  // [9:9] is the sub-list for extension type_name
+	9,  // [9:9] is the sub-list for extension extendee
+	0,  // [0:9] is the sub-list for field type_name
 }
 
 func init() { file_proto_user_proto_init() }
@@ -2274,6 +2565,54 @@ func file_proto_user_proto_init() {
 				return nil
 			}
 		}
+		file_proto_user_proto_msgTypes[28].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SendMagicLinkRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_user_proto_msgTypes[29].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SendMagicLinkResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_user_proto_msgTypes[30].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*VerifyTokenRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_user_proto_msgTypes[31].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*VerifyTokenResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -2281,7 +2620,7 @@ func file_proto_user_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_proto_user_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   31,
+			NumMessages:   35,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

user/proto/user.pb.micro.go

@@ -55,6 +55,8 @@ type UserService interface {
 	SendPasswordResetEmail(ctx context.Context, in *SendPasswordResetEmailRequest, opts ...client.CallOption) (*SendPasswordResetEmailResponse, error)
 	ResetPassword(ctx context.Context, in *ResetPasswordRequest, opts ...client.CallOption) (*ResetPasswordResponse, error)
 	List(ctx context.Context, in *ListRequest, opts ...client.CallOption) (*ListResponse, error)
+	SendMagicLink(ctx context.Context, in *SendMagicLinkRequest, opts ...client.CallOption) (User_SendMagicLinkService, error)
+	VerifyToken(ctx context.Context, in *VerifyTokenRequest, opts ...client.CallOption) (*VerifyTokenResponse, error)
 }
 
 type userService struct {
@@ -199,6 +201,65 @@ func (c *userService) List(ctx context.Context, in *ListRequest, opts ...client.
 	return out, nil
 }
 
+func (c *userService) SendMagicLink(ctx context.Context, in *SendMagicLinkRequest, opts ...client.CallOption) (User_SendMagicLinkService, error) {
+	req := c.c.NewRequest(c.name, "User.SendMagicLink", &SendMagicLinkRequest{})
+	stream, err := c.c.Stream(ctx, req, opts...)
+	if err != nil {
+		return nil, err
+	}
+	if err := stream.Send(in); err != nil {
+		return nil, err
+	}
+	return &userServiceSendMagicLink{stream}, nil
+}
+
+type User_SendMagicLinkService interface {
+	Context() context.Context
+	SendMsg(interface{}) error
+	RecvMsg(interface{}) error
+	Close() error
+	Recv() (*SendMagicLinkResponse, error)
+}
+
+type userServiceSendMagicLink struct {
+	stream client.Stream
+}
+
+func (x *userServiceSendMagicLink) Close() error {
+	return x.stream.Close()
+}
+
+func (x *userServiceSendMagicLink) Context() context.Context {
+	return x.stream.Context()
+}
+
+func (x *userServiceSendMagicLink) SendMsg(m interface{}) error {
+	return x.stream.Send(m)
+}
+
+func (x *userServiceSendMagicLink) RecvMsg(m interface{}) error {
+	return x.stream.Recv(m)
+}
+
+func (x *userServiceSendMagicLink) Recv() (*SendMagicLinkResponse, error) {
+	m := new(SendMagicLinkResponse)
+	err := x.stream.Recv(m)
+	if err != nil {
+		return nil, err
+	}
+	return m, nil
+}
+
+func (c *userService) VerifyToken(ctx context.Context, in *VerifyTokenRequest, opts ...client.CallOption) (*VerifyTokenResponse, error) {
+	req := c.c.NewRequest(c.name, "User.VerifyToken", in)
+	out := new(VerifyTokenResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 // Server API for User service
 
 type UserHandler interface {
@@ -215,6 +276,8 @@ type UserHandler interface {
 	SendPasswordResetEmail(context.Context, *SendPasswordResetEmailRequest, *SendPasswordResetEmailResponse) error
 	ResetPassword(context.Context, *ResetPasswordRequest, *ResetPasswordResponse) error
 	List(context.Context, *ListRequest, *ListResponse) error
+	SendMagicLink(context.Context, *SendMagicLinkRequest, User_SendMagicLinkStream) error
+	VerifyToken(context.Context, *VerifyTokenRequest, *VerifyTokenResponse) error
 }
 
 func RegisterUserHandler(s server.Server, hdlr UserHandler, opts ...server.HandlerOption) error {
@@ -232,6 +295,8 @@ func RegisterUserHandler(s server.Server, hdlr UserHandler, opts ...server.Handl
 		SendPasswordResetEmail(ctx context.Context, in *SendPasswordResetEmailRequest, out *SendPasswordResetEmailResponse) error
 		ResetPassword(ctx context.Context, in *ResetPasswordRequest, out *ResetPasswordResponse) error
 		List(ctx context.Context, in *ListRequest, out *ListResponse) error
+		SendMagicLink(ctx context.Context, stream server.Stream) error
+		VerifyToken(ctx context.Context, in *VerifyTokenRequest, out *VerifyTokenResponse) error
 	}
 	type User struct {
 		user
@@ -295,3 +360,47 @@ func (h *userHandler) ResetPassword(ctx context.Context, in *ResetPasswordReques
 func (h *userHandler) List(ctx context.Context, in *ListRequest, out *ListResponse) error {
 	return h.UserHandler.List(ctx, in, out)
 }
+
+func (h *userHandler) SendMagicLink(ctx context.Context, stream server.Stream) error {
+	m := new(SendMagicLinkRequest)
+	if err := stream.Recv(m); err != nil {
+		return err
+	}
+	return h.UserHandler.SendMagicLink(ctx, m, &userSendMagicLinkStream{stream})
+}
+
+type User_SendMagicLinkStream interface {
+	Context() context.Context
+	SendMsg(interface{}) error
+	RecvMsg(interface{}) error
+	Close() error
+	Send(*SendMagicLinkResponse) error
+}
+
+type userSendMagicLinkStream struct {
+	stream server.Stream
+}
+
+func (x *userSendMagicLinkStream) Close() error {
+	return x.stream.Close()
+}
+
+func (x *userSendMagicLinkStream) Context() context.Context {
+	return x.stream.Context()
+}
+
+func (x *userSendMagicLinkStream) SendMsg(m interface{}) error {
+	return x.stream.Send(m)
+}
+
+func (x *userSendMagicLinkStream) RecvMsg(m interface{}) error {
+	return x.stream.Recv(m)
+}
+
+func (x *userSendMagicLinkStream) Send(m *SendMagicLinkResponse) error {
+	return x.stream.Send(m)
+}
+
+func (h *userHandler) VerifyToken(ctx context.Context, in *VerifyTokenRequest, out *VerifyTokenResponse) error {
+	return h.UserHandler.VerifyToken(ctx, in, out)
+}

user/proto/user.proto

@@ -18,6 +18,8 @@ service User {
 	rpc SendPasswordResetEmail(SendPasswordResetEmailRequest) returns (SendPasswordResetEmailResponse) {}
 	rpc ResetPassword(ResetPasswordRequest) returns (ResetPasswordResponse) {}
 	rpc List(ListRequest) returns(ListResponse) {}
+	rpc SendMagicLink(SendMagicLinkRequest) returns (stream SendMagicLinkResponse) {}
+	rpc VerifyToken(VerifyTokenRequest) returns (VerifyTokenResponse) {}
 }
 
 message Account {
@@ -237,3 +239,38 @@ message ListRequest {
 message ListResponse {
 	repeated Account users = 1;
 }
+
+// Login using email only - Passwordless
+message SendMagicLinkRequest {
+	// the email address of the user
+	string email = 1;
+	string subject = 2;
+	// Text content of the email. Don't forget to include the string '$micro_verification_link' which will be replaced by the real verification link
+	// HTML emails are not available currently.
+	string textContent = 3;
+	// Display name of the sender for the email. Note: the email address will still be 'support@m3o.com'
+	string fromName = 4;
+	// Your web site address, example www.example.com or user.example.com
+	string address = 5;
+	// Endpoint name where your http request handler handles MagicLink by 
+	// calling M3O VerifyToken endpoint. You can return as a result a success, 
+	// failed or redirect to another page. 
+	string endpoint = 6;
+}
+
+message SendMagicLinkResponse {
+	Session session = 1;
+}
+
+// Check whether the token attached to MagicLink is valid or not.
+// Ideally, you need to call this endpoint from your http request  
+// handler that handles the endpoint which is specified in the 
+// SendMagicLink request. 
+message VerifyTokenRequest {
+	string token = 1;
+}
+
+message VerifyTokenResponse {
+	bool is_valid = 1;
+	string message = 2;
+}