public IEnumerable <UserDTO> GetAll()
 {
     return(UserDTO.Select(_userManager.Users)
            .OrderBy(u => u.LastName)
            .ThenBy(u => u.FirstName)
            .ToList());
 }
        public async Task <UserDTO> GetById(string id)
        {
            var user = await _userManager.FindByIdAsync(id);

            return(UserDTO.Select(user));
        }