Bubble App Connector - Login from multiple pages

I’ve successfully set up Bubble App Connector using Neeja’s excellent post:

I have my main app “App A”, and a secondary app, “App B”.

I would like to put the login link in the header of “App B” so it appears on every page. In “App A” I have to put in a Redirect_uri but this would only apply to one page in “App B”.


Is there a generic Redirect_uri I can use? Is there another way to set this up so that I can have a login link on every page in “App B”?