public function login()
{
$data = Input::all();
$rules = ['phone' => 'required|min:11', 'password' => 'required|min:8'];
$val = Validator::make($data, $rules);
if ($val->fails()) {
return View::make('errors.validation')->with('errors', $val->messages()->toArray());
}
$user = User::login($data);
}