using env vars for id and secreat; removing dummy constructor

mailxpert/apibundle/0.1/config/packages/mailxpert_apibundle.yaml

@@ -1,6 +1,6 @@
 mailxpert_api:
     access_token_class: App\Entity\AccessToken
     oauth:
-        client_id: 'client_id_to_replace'
-        client_secret: 'client_secret_to_replace'
+        client_id: '%env(MAILXPERT_CLIENT_ID)%'
+        client_secret: '%env(MAILXPERT_CLIENT_SECRET)%'
         redirect_url: 'http://example.com/mx/oauth/code'

mailxpert/apibundle/0.1/manifest.json

@@ -5,5 +5,9 @@
     "copy-from-recipe": {
         "config/": "%CONFIG_DIR%/",
         "src/Entity/AccessToken.php": "%SRC_DIR%/Entity/AccessToken.php"
+    },
+    "env": {
+        "MAILXPERT_CLIENT_ID": "mailxpert_client_id_to_replace",
+        "MAILXPERT_CLIENT_SECRET": "mailxpert_client_secret_to_replace"
     }
 }

mailxpert/apibundle/0.1/src/Entity/AccessToken.php

@@ -18,9 +18,4 @@ class AccessToken extends BaseAccessToken
      */
     protected $id;
 
-    public function __construct()
-    {
-        parent::__construct();
-        // your own logic
-    }
 }