public void AddUser(HighFiveUser user)
        {
            var highFiveUser = GetUserByEmail(user.Email);

            if (highFiveUser != null)
            {
                throw new HighFiveException($"User {user.Email} already exists in the database");
            }
            _context.Users.Add(user);
        }
 public void DeleteUser(HighFiveUser user)
 {
     _context.Users.Remove(user);
 }
 public void UpdateUser(HighFiveUser user)
 {
     _context.Update(user);
 }