config change & bug fix

src/Auth.php

@@ -54,11 +54,25 @@ class Auth
                 ],
             ]);
         }
-        $this->choose();
     }
 
-    public function choose($name = null)
+    protected function matchConfigById($id)
     {
+        foreach ($this->config['apps'] as $name => $app) {
+            if ($app['id'] == $id) {
+                return $name;
+            }
+        }
+        return null;
+    }
+
+    public function choose($name = null, $id = null)
+    {
+        if ($id) {
+            $name = $this->matchConfigByid($id);
+            $this->choose($name);
+        }
+
         if (!$name) {
             $name = env('APP_NAME');
         }

src/PdAuthServiceProvider.php

@@ -67,7 +67,8 @@ class PdAuthServiceProvider extends ServiceProvider
         //添加获取token的路由
         $this->app['router']->get('auth/token.json', function (Request $request) {
             $code = $request->input('pd_code');
-            $token = app('pd.auth')->getAccessToken($code);
+            $id = $request->input('app_id');
+            $token = app('pd.auth')->choose(null, $id)->getAccessToken($code);
             $cookie = new Cookie(Authenticate::CookieName, $token['access_token'], strtotime($token['expired_at']));
             return response()->json([
                 'code' => 0,