public UserDTO VerifyUser(string email, string password)
        {
            User user = _context.Users.Where(x => x.Email == email).SingleOrDefault();

            if (user == null)
            {
                return(null);
            }
            if (Hashing.Check(user.Password, password))
            {
                return(UserDTO.Map(user));
            }
            return(null);
        }