Can now register with Bunq and get device server ID.

app/Support/Import/Prerequisites/PrerequisitesInterface.php

@@ -13,6 +13,8 @@ namespace FireflyIII\Support\Import\Prerequisites;
 
 
 use FireflyIII\User;
+use Illuminate\Http\Request;
+use Illuminate\Support\MessageBag;
 
 interface PrerequisitesInterface
 {
@@ -30,6 +32,13 @@ interface PrerequisitesInterface
      */
     public function getViewParameters(): array;
 
+    /**
+     * @param Request $request
+     *
+     * @return MessageBag
+     */
+    public function storePrerequisites(Request $request): MessageBag;
+
     /**
      * Returns if this import method has any special prerequisites such as config
      * variables or other things.