Issue #3292489 by szeidler: Revoke authentication button should only be shown for OAuth 2.0

src/FotowebWidgetTrait.php

@@ -69,7 +69,7 @@ trait FotowebWidgetTrait {
     }
 
     // Create the widget using an <iframe>.
-    return [
+    $build = [
       'widget' => [
         '#type' => 'html_tag',
         '#tag' => 'iframe',
@@ -79,7 +79,11 @@ trait FotowebWidgetTrait {
           'height' => $widget_height,
         ],
       ],
-      'revoke_authenticate_button' => [
+    ];
+
+    // Revoking is only necessary for OAuth 2.0 based integrations.
+    if ($config->get('auth_type') === 'oauth2') {
+      $build['revoke_authenticate_button'] = [
         '#type' => 'link',
         '#title' => $this->t('Revoke authentication with Fotoware'),
         '#attributes' => [
@@ -91,8 +95,10 @@ trait FotowebWidgetTrait {
           'target' => '_blank',
         ],
         '#url' => Url::fromRoute('media_fotoweb.oauth2_revoke'),
-      ],
-    ];
+      ];
+    }
+
+    return $build;
   }
 
   /**