message: handling error by outputing the message to the div
diff: @@ -56,6 +56,7 @@ When using ALB authentication Backstage will only be loaded once the user has su
  ```ts
  const DummySignInComponent: any = (props: any) => {
  + try {
  const config = useApi(configApiRef);
  const shouldAuth = !!config.getOptionalConfig('auth.providers.awsalb');
  if (shouldAuth) {
  @@ -77,8 +78,10 @@ const DummySignInComponent: any = (props: any) => {
  },
  });
  }
  -
  return <div />;
  + } catch (err) {
  + return <div>{err.message}</div>;
  + }
  };
  ```
  