add clear

qq/Account.php

@@ -48,6 +48,10 @@ class Account extends Miniprogarampage
 		$param['js_code'] = $code;
 		$param['grant_type'] = 'authorization_code';
 
+		if (empty($code)) {
+			return new Result(['code' => 404, 'message' => '临时登录凭证不能为空.']);
+		}
+
 		$this->request->setHost('api.q.qq.com');
 		$this->request->setMethod(WxClient::GET);
 		$this->request->addHeader('Content-Type', 'text/xml');

qq/QqSDK.php

@@ -106,7 +106,7 @@ class QqSDK
 
 
 	/**
-	 * @return WxClient
+	 * @return Token
 	 */
 	public function getAccessToken()
 	{