diff --git a/internal/app/httpserver/user/register.go b/internal/app/httpserver/user/register.go
index d0a2355..516d461 100644
--- a/internal/app/httpserver/user/register.go
+++ b/internal/app/httpserver/user/register.go
@@ -33,7 +33,7 @@ func (r *userRouter) Register(ctx *gin.Context) {
 		return
 	}
 
-	err := r.authUseCase.Register(ctx, req.Login, req.Password)
+	userID, err := r.authUseCase.Register(ctx, req.Login, req.Password)
 
 	if err != nil && errors.As(err, &autherrors.UserAlreadyExistsError{}) {
 		ctx.AbortWithStatus(http.StatusConflict)
@@ -46,7 +46,7 @@ func (r *userRouter) Register(ctx *gin.Context) {
 		return
 	}
 
-	err = r.authorizeUser(ctx, req.Login)
+	err = r.authorizeUser(ctx, userID)
 
 	if err != nil {
 		r.logger.ErrorCtx(ctx, fmt.Errorf("failed authorize user"))
diff --git a/internal/app/usecase/auth/register.go b/internal/app/usecase/auth/register.go
index 5e620f7..764e16c 100644
--- a/internal/app/usecase/auth/register.go
+++ b/internal/app/usecase/auth/register.go
@@ -7,13 +7,13 @@ import (
 	"github.com/Froctnow/yandex-go-diploma/internal/app/usecase/auth/errors"
 )
 
-func (u *authUseCase) Register(ctx context.Context, login string, password string) error {
+func (u *authUseCase) Register(ctx context.Context, login string, password string) (string, error) {
 	hashPassword, err := u.hashPassword(password)
 
 	if err != nil {
 		err = fmt.Errorf("can't hash password: %w", err)
 		u.logger.ErrorCtx(ctx, err)
-		return err
+		return "", err
 	}
 
 	userID, err := u.provider.CreateUser(ctx, nil, login, hashPassword)
@@ -21,14 +21,14 @@ func (u *authUseCase) Register(ctx context.Context, login string, password strin
 	if err != nil {
 		err = fmt.Errorf("can't create user: %w", err)
 		u.logger.ErrorCtx(ctx, err)
-		return err
+		return "", err
 	}
 
 	if userID == "" {
 		err = errors.UserAlreadyExistsError{}
 		u.logger.ErrorCtx(ctx, err)
-		return err
+		return "", err
 	}
 
-	return nil
+	return userID, nil
 }
diff --git a/internal/app/usecase/auth/usecase.go b/internal/app/usecase/auth/usecase.go
index b0a1969..5bd267b 100644
--- a/internal/app/usecase/auth/usecase.go
+++ b/internal/app/usecase/auth/usecase.go
@@ -25,7 +25,7 @@ func NewUseCase(
 }
 
 type UseCase interface {
-	Register(ctx context.Context, login string, password string) error
+	Register(ctx context.Context, login string, password string) (string, error)
 	Login(ctx context.Context, login string, password string) (string, error)
 }