public (string AccessToken, string RefreshToken) Login(string email, string password)
        {
            List <User> userList = dbContext.Users.Where(u => u.Email == email && u.Password == password).ToList();

            if (userList.Count == 0)
            {
                return(null, null);
            }
            User          user          = userList.First();
            JwtTokensData jwtTokensData = tokenBusinessLogic.CreateJwtTokens(user);

            tokenBusinessLogic.AddNewToken(user, jwtTokensData.AccessToken, jwtTokensData.RefreshTokenSerial);
            return(jwtTokensData.AccessToken, jwtTokensData.RefreshTokenSerial);
        }