title: authClient.login returning error with "Unauthorized request origin"
body: <p>This just started happening within the past few days, and my code hasn't changed.  Have I made a mistake, or is this new?</p>
  
  <p>It seems like it's implying there's a rule I should be adding to my security rules in firebase forge to allow access from the domain I'm working on (in this case localhost), but I don't know where to find that documentation.</p>
  
  <p>Can anyone help?  How do I get past this error?</p>