diff --git a/internal/transport/grpc/grpc.go b/internal/transport/grpc/grpc.go
index 3628d4d..0e92b90 100644
--- a/internal/transport/grpc/grpc.go
+++ b/internal/transport/grpc/grpc.go
@@ -21,7 +21,7 @@ type user struct {
 
 type AuthDBServer struct {
 	mu    sync.Mutex
-	users map[string]user
+	users map[string]*user
 	api.UnimplementedAuthDBServer
 	id int32
 }
@@ -29,7 +29,7 @@ type AuthDBServer struct {
 func NewServer() *AuthDBServer {
 	return &AuthDBServer{
 		mu:    sync.Mutex{},
-		users: make(map[string]user),
+		users: make(map[string]*user),
 		id:    0,
 	}
 }
@@ -74,7 +74,7 @@ func (s *AuthDBServer) Registration(ctx context.Context, req *api.RegistrationRe
 	code := strconv.Itoa(unique)
 
 	//
-	s.users[req.Login] = user{
+	s.users[req.Login] = &user{
 		ID:        s.id,
 		Code:      code,
 		Login:     req.GetLogin(),