diff --git a/backend/.vscode/launch.json b/backend/.vscode/launch.json
index 5f0bf69..29f0023 100644
--- a/backend/.vscode/launch.json
+++ b/backend/.vscode/launch.json
@@ -5,7 +5,7 @@
         "version": "0.2.0",
         "configurations": [
                 {
-                        "name": "debug",
+                        "name": "blockd",
                         "type": "go",
                         "request": "launch",
                         "mode": "auto",
@@ -14,6 +14,7 @@
                                 "-log-level=debug",
                                 "-log-local=true",
                                 "-log-add-source=true",
+                                "-jwt-secret=local_jwt_secret",
 
                                 "-rest-address=localhost:8080",
                                 "-db-host=localhost:8432",
diff --git a/backend/Makefile b/backend/Makefile
index bac4cb0..542ad58 100644
--- a/backend/Makefile
+++ b/backend/Makefile
@@ -30,7 +30,8 @@ run.local: bin.build
 		-db-database=blockd \
 		-db-user=blockd \
 		-db-secret=blockd \
-		-db-enable-tls=false
+		-db-enable-tls=false \
+		-jwt-secret=local_jwt_secret
 
 .PHONY: run.debug
 run.debug: bin.build
diff --git a/backend/cmd/main.go b/backend/cmd/main.go
index 0b726bb..c20be3c 100644
--- a/backend/cmd/main.go
+++ b/backend/cmd/main.go
@@ -34,6 +34,9 @@ func main() {
 				Name:  "log-add-source",
 				Value: true,
 			},
+			&cli.StringFlag{
+				Name: "jwt-secret",
+			},
 
 			// rest
 			&cli.StringFlag{
@@ -77,6 +80,7 @@ func main() {
 					LogLocal:     c.Bool("log-local"),
 					LogFile:      c.String("log-file"),
 					LogAddSource: c.Bool("log-add-source"),
+					JWTSecret:    []byte(c.String("jwt-secret")),
 				},
 				Rest: config.RestConfig{
 					Address: c.String("rest-address"),
diff --git a/backend/internal/factory/interactors.go b/backend/internal/factory/interactors.go
new file mode 100644
index 0000000..f3ea68c
--- /dev/null
+++ b/backend/internal/factory/interactors.go
@@ -0,0 +1,21 @@
+package factory
+
+import (
+	"log/slog"
+
+	"github.com/emochka2007/block-accounting/internal/pkg/config"
+	"github.com/emochka2007/block-accounting/internal/usecase/interactors/jwt"
+	"github.com/emochka2007/block-accounting/internal/usecase/interactors/users"
+	urepo "github.com/emochka2007/block-accounting/internal/usecase/repository/users"
+)
+
+func provideUsersInteractor(
+	log *slog.Logger,
+	usersRepo urepo.Repository,
+) users.UsersInteractor {
+	return users.NewUsersInteractor(log.WithGroup("users-interactor"), usersRepo)
+}
+
+func provideJWTInteractor(c config.Config) jwt.JWTInteractor {
+	return jwt.NewWardenJWT(c.Common.JWTSecret)
+}
diff --git a/backend/internal/factory/interface.go b/backend/internal/factory/interface.go
index fcb79fe..b82c1ab 100644
--- a/backend/internal/factory/interface.go
+++ b/backend/internal/factory/interface.go
@@ -4,13 +4,22 @@ import (
 	"log/slog"
 	"os"
 
+	"github.com/google/wire"
+
 	"github.com/emochka2007/block-accounting/internal/interface/rest"
 	"github.com/emochka2007/block-accounting/internal/interface/rest/controllers"
 	"github.com/emochka2007/block-accounting/internal/interface/rest/presenters"
 	"github.com/emochka2007/block-accounting/internal/pkg/config"
 	"github.com/emochka2007/block-accounting/internal/pkg/logger"
+	"github.com/emochka2007/block-accounting/internal/usecase/interactors/jwt"
 	"github.com/emochka2007/block-accounting/internal/usecase/interactors/users"
-	urepo "github.com/emochka2007/block-accounting/internal/usecase/repository/users"
+)
+
+var interfaceSet wire.ProviderSet = wire.NewSet(
+	provideAuthController,
+	provideControllers,
+
+	provideAuthPresenter,
 )
 
 func provideLogger(c config.Config) *slog.Logger {
@@ -36,20 +45,31 @@ func provideLogger(c config.Config) *slog.Logger {
 	return lb.Build()
 }
 
+func provideAuthPresenter(
+	jwtInteractor jwt.JWTInteractor,
+) presenters.AuthPresenter {
+	return presenters.NewAuthPresenter(jwtInteractor)
+}
+
+func provideAuthController(
+	log *slog.Logger,
+	usersInteractor users.UsersInteractor,
+	authPresenter presenters.AuthPresenter,
+) controllers.AuthController {
+	return controllers.NewAuthController(
+		log.WithGroup("auth-controller"),
+		authPresenter,
+		usersInteractor,
+	)
+}
+
 func provideControllers(
 	log *slog.Logger,
-	usersRepo urepo.Repository,
+	authController controllers.AuthController,
 ) *controllers.RootController {
 	return &controllers.RootController{
 		Ping: controllers.NewPingController(log.WithGroup("ping-controller")),
-		Auth: controllers.NewAuthController(
-			log.WithGroup("auth-controller"),
-			presenters.NewAuthPresenter(),
-			users.NewUsersInteractor(
-				log.WithGroup("users-interactor"),
-				usersRepo,
-			),
-		),
+		Auth: authController,
 	}
 }
 
diff --git a/backend/internal/factory/wire.go b/backend/internal/factory/wire.go
index ccd520c..623b0d9 100644
--- a/backend/internal/factory/wire.go
+++ b/backend/internal/factory/wire.go
@@ -11,9 +11,11 @@ import (
 
 func ProvideService(c config.Config) (service.Service, func(), error) {
 	wire.Build(
-		provideUsersRepository,
 		provideLogger,
-		provideControllers,
+		provideUsersRepository,
+		provideUsersInteractor,
+		provideJWTInteractor,
+		interfaceSet,
 		provideRestServer,
 		service.NewService,
 	)
diff --git a/backend/internal/factory/wire_gen.go b/backend/internal/factory/wire_gen.go
index 2ce4f6e..9959819 100644
--- a/backend/internal/factory/wire_gen.go
+++ b/backend/internal/factory/wire_gen.go
@@ -19,7 +19,11 @@ func ProvideService(c config.Config) (service.Service, func(), error) {
 	if err != nil {
 		return nil, nil, err
 	}
-	rootController := provideControllers(logger, repository)
+	usersInteractor := provideUsersInteractor(logger, repository)
+	jwtInteractor := provideJWTInteractor(c)
+	authPresenter := provideAuthPresenter(jwtInteractor)
+	authController := provideAuthController(logger, usersInteractor, authPresenter)
+	rootController := provideControllers(logger, authController)
 	server := provideRestServer(logger, rootController, c)
 	serviceService := service.NewService(logger, server)
 	return serviceService, func() {
diff --git a/backend/internal/interface/rest/controllers/auth.go b/backend/internal/interface/rest/controllers/auth.go
index dfacdf4..3364ea2 100644
--- a/backend/internal/interface/rest/controllers/auth.go
+++ b/backend/internal/interface/rest/controllers/auth.go
@@ -10,6 +10,7 @@ import (
 
 	"github.com/emochka2007/block-accounting/internal/interface/rest/presenters"
 	"github.com/emochka2007/block-accounting/internal/pkg/bip32"
+	"github.com/emochka2007/block-accounting/internal/usecase/interactors/jwt"
 	"github.com/emochka2007/block-accounting/internal/usecase/interactors/users"
 )
 
@@ -28,6 +29,7 @@ type authController struct {
 	log             *slog.Logger
 	presenter       presenters.AuthPresenter
 	usersInteractor users.UsersInteractor
+	jwtInteractor   jwt.JWTInteractor
 }
 
 func NewAuthController(
@@ -45,27 +47,32 @@ func NewAuthController(
 func (c *authController) Join(w http.ResponseWriter, req *http.Request) error {
 	request, err := c.presenter.CreateJoinRequest(req)
 	if err != nil {
-		return fmt.Errorf("error create join request. %w", err)
+		return c.presenter.ResponseJoin(
+			w, nil, fmt.Errorf("error create join request. %w", err),
+		)
 	}
 
 	c.log.Debug("join request", slog.String("mnemonic", request.Mnemonic))
 
 	if !bip32.IsMnemonicValid(request.Mnemonic) {
-		return fmt.Errorf("error invalid mnemonic. %w", ErrorAuthInvalidMnemonic)
+		return c.presenter.ResponseJoin(
+			w, nil, fmt.Errorf("error invalid mnemonic. %w", ErrorAuthInvalidMnemonic),
+		)
 	}
 
 	ctx, cancel := context.WithTimeout(req.Context(), 5*time.Second)
 	defer cancel()
 
-	if _, err = c.usersInteractor.Create(ctx, users.CreateParams{
+	user, err := c.usersInteractor.Create(ctx, users.CreateParams{
 		Mnemonic: request.Mnemonic,
 		IsAdmin:  true,
 		Activate: true,
-	}); err != nil {
-		return fmt.Errorf("error create new user. %w", err)
+	})
+	if err != nil {
+		return c.presenter.ResponseJoin(w, nil, fmt.Errorf("error create new user. %w", err))
 	}
 
-	return nil
+	return c.presenter.ResponseJoin(w, user, nil)
 }
 
 func (c *authController) JoinWithInvite(w http.ResponseWriter, req *http.Request) error {
diff --git a/backend/internal/interface/rest/domain/dto.go b/backend/internal/interface/rest/domain/dto.go
index ef99894..3d246cd 100644
--- a/backend/internal/interface/rest/domain/dto.go
+++ b/backend/internal/interface/rest/domain/dto.go
@@ -9,6 +9,27 @@ type JoinRequest struct {
 	Mnemonic string `json:"mnemonic"`
 }
 
+type JoinResponse struct {
+	Ok    bool   `json:"ok"`
+	Token string `json:"token,omitempty"`
+	Error *Error `json:"error,omitempty"`
+}
+
+type LoginRequest struct {
+	Mnemonc string `json:"mnemonic"`
+}
+
+type LoginResponse struct {
+	Ok    bool   `json:"ok"`
+	Token string `json:"token,omitempty"`
+	Error *Error `json:"error,omitempty"`
+}
+
+type Error struct {
+	Code    int    `json:"code"`
+	Message string `json:"message"`
+}
+
 func BuildRequest[T any](data []byte) (*T, error) {
 	var req T
 
diff --git a/backend/internal/interface/rest/presenters/auth.go b/backend/internal/interface/rest/presenters/auth.go
index 597997b..f3a95c6 100644
--- a/backend/internal/interface/rest/presenters/auth.go
+++ b/backend/internal/interface/rest/presenters/auth.go
@@ -5,19 +5,28 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"time"
 
 	"github.com/emochka2007/block-accounting/internal/interface/rest/domain"
+	"github.com/emochka2007/block-accounting/internal/pkg/models"
+	"github.com/emochka2007/block-accounting/internal/usecase/interactors/jwt"
 )
 
 type AuthPresenter interface {
 	CreateJoinRequest(r *http.Request) (*domain.JoinRequest, error)
-	// ResponseJoin(w http.ResponseWriter, mnemonic string) error
+	ResponseJoin(w http.ResponseWriter, user *models.User, err error) error
 }
 
-type authPresenter struct{}
+type authPresenter struct {
+	jwtInteractor jwt.JWTInteractor
+}
 
-func NewAuthPresenter() AuthPresenter {
-	return &authPresenter{}
+func NewAuthPresenter(
+	jwtInteractor jwt.JWTInteractor,
+) AuthPresenter {
+	return &authPresenter{
+		jwtInteractor: jwtInteractor,
+	}
 }
 
 func (p *authPresenter) CreateJoinRequest(r *http.Request) (*domain.JoinRequest, error) {
@@ -37,17 +46,29 @@ func (p *authPresenter) CreateJoinRequest(r *http.Request) (*domain.JoinRequest,
 	return &request, nil
 }
 
-// func (p *authPresenter) ResponseJoin(w http.ResponseWriter, mnemonic string) error {
-// 	out, err := json.Marshal(domain.JoinResponse{
-// 		Mnemonic: mnemonic,
-// 	})
-// 	if err != nil {
-// 		return fmt.Errorf("error marshal join response. %w", err)
-// 	}
+func (p *authPresenter) ResponseJoin(w http.ResponseWriter, user *models.User, err error) error {
+	resp := new(domain.JoinResponse)
 
-// 	if _, err = w.Write(out); err != nil {
-// 		return fmt.Errorf("error write response. %w", err)
-// 	}
+	if err != nil {
+		// todo map error
+	} else {
+		token, err := p.jwtInteractor.NewToken(user, 24*time.Hour)
+		if err != nil {
+			return fmt.Errorf("error create access token. %w", err)
+		}
 
-// 	return nil
-// }
+		resp.Ok = true
+		resp.Token = token
+	}
+
+	out, err := json.Marshal(resp)
+	if err != nil {
+		return fmt.Errorf("error marshal join response. %w", err)
+	}
+
+	if _, err = w.Write(out); err != nil {
+		return fmt.Errorf("error write response. %w", err)
+	}
+
+	return nil
+}
diff --git a/backend/internal/pkg/config/config.go b/backend/internal/pkg/config/config.go
index a05b2bc..c2cbd4d 100644
--- a/backend/internal/pkg/config/config.go
+++ b/backend/internal/pkg/config/config.go
@@ -12,6 +12,8 @@ type CommonConfig struct {
 	LogLocal     bool
 	LogFile      string
 	LogAddSource bool
+
+	JWTSecret []byte
 }
 
 type RestConfig struct {
diff --git a/backend/internal/usecase/interactors/smartcontract/contract.go b/backend/internal/usecase/interactors/smartcontract/contract.go
index cccb96c..bea406a 100644
--- a/backend/internal/usecase/interactors/smartcontract/contract.go
+++ b/backend/internal/usecase/interactors/smartcontract/contract.go
@@ -6,7 +6,6 @@ import (
 	"github.com/emochka2007/block-accounting/internal/pkg/models"
 	"github.com/emochka2007/block-accounting/internal/usecase/interactors/users"
 	"github.com/emochka2007/block-accounting/internal/usecase/repository/transactions"
-	"github.com/ethereum/go-ethereum"
 	"github.com/ethereum/go-ethereum/ethclient"
 	"github.com/google/uuid"
 )
@@ -32,5 +31,7 @@ type smartContractInteractor struct {
 
 // todo
 func (s *smartContractInteractor) SignTransaction(ctx context.Context, params SignTransactionParams) error {
-	s.client.CallContract(ctx, ethereum.CallMsg{}, nil)
+	// s.client.CallContract(ctx, ethereum.CallMsg{}, nil)
+
+	return nil
 }
diff --git a/backend/internal/usecase/repository/users/repository.go b/backend/internal/usecase/repository/users/repository.go
index 1196429..708ed34 100644
--- a/backend/internal/usecase/repository/users/repository.go
+++ b/backend/internal/usecase/repository/users/repository.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"database/sql"
 	"fmt"
+	"time"
 
 	sq "github.com/Masterminds/squirrel"
 	"github.com/emochka2007/block-accounting/internal/pkg/models"
@@ -21,7 +22,7 @@ type GetParams struct {
 type Repository interface {
 	Get(ctx context.Context, params GetParams) (*models.User, error)
 	Create(ctx context.Context, user *models.User) error
-	Activate(ctx context.Context, id string) error
+	Activate(ctx context.Context, id uuid.UUID) error
 	Update(ctx context.Context, user *models.User) error
 	Delete(ctx context.Context, id string) error
 }
@@ -89,8 +90,19 @@ func (r *repositorySQL) Create(ctx context.Context, user *models.User) error {
 	return nil
 }
 
-func (r *repositorySQL) Activate(ctx context.Context, id string) error {
+func (r *repositorySQL) Activate(ctx context.Context, id uuid.UUID) error {
 	if err := sqltools.Transaction(ctx, r.db, func(ctx context.Context) error {
+		query := sq.Update("users").
+			SetMap(sq.Eq{
+				"activated_at": time.Now(),
+			}).
+			Where(sq.Eq{
+				"id": id,
+			})
+
+		if _, err := query.RunWith(r.Conn(ctx)).ExecContext(ctx); err != nil {
+			return fmt.Errorf("error mark user as activated in database. %w", err)
+		}
 
 		return nil
 	}); err != nil {