/// <summary>
 /// DELETE api/TaiKhoan<br/>
 /// Deletes an account that exists in server, you only delete your account
 /// </summary>
 /// <param name="name">Username</param>
 /// <returns>Code: 200 or 400 or 404</returns>
 public IHttpActionResult Delete(string name)
 {
     if (!ModelState.IsValid || !HttpContext.Current.User.Identity.Name.Equals(name, StringComparison.OrdinalIgnoreCase))
     {
         return(BadRequest("Invalid request"));
     }
     if (DangNhap.DeleteAccount(name))
     {
         return(Ok());
     }
     return(NotFound());
 }