public function login()
 {
     require_once 'model/doctor.php';
     //echo "in login";
     //session_start();
     $user_name = $_POST['username'];
     $pwd = $_POST['password'];
     //$encpwd = sha1($password);
     //echo $username . $password;
     Doctor::auth($user_name, $pwd);
     // var_dump("yay");
     header('location: view/doctor/profile.php');
 }