Hi @Daniel_Miller,
Yes, the feature mentioned above has shipped already.
For the login component, we do have an "Auth login" component that can be used to kick off custom auth for specific resources. To use the component, you'd configure the custom auth as needed for a specific REST API resource. It doesn't look like resources using AWS v4 auth can be connected to the component, but the auth should be handled automatically once at least one query is added to the app.