修改登录认证方法

Signed-off-by: 码龍 <695798354@qq.com>

application/admin/library/Auth.php

@@ -51,7 +51,7 @@ class Auth extends \fast\Auth
             $this->setError('Please try again after 1 day');
             return false;
         }
-        if ($admin->password != md5(md5($password) . $admin->salt)) {
+        if ($admin->password != Admin::encryptPassword($password, $admin->salt)) {
             $admin->loginfailure++;
             $admin->save();
             $this->setError('Password is incorrect');