get redirect to OAuth login showing authorization screen

auth.js

@@ -26,7 +26,7 @@ export class Auth {
     search.set('client_id', this.giteaClientId)
     search.set(
       'redirect_uri',
-      this.remoteBaseUrl + '/auth/callback'
+      this.remoteBaseUrl + '/api/auth/callback'
     )
     search.set('state', state)
     url.search = search.toString()
@@ -50,9 +50,9 @@ export class Auth {
       name: 'oauth.gitea.state',
       value: state,
     })
-    return new Response('', {
+    event.respondWith(new Response('', {
       headers,
       status: 302,
-    })
+    }))
   }
 }