APP_URL could be inffered instead of configured on settings.py

[renzon]

This must be done so the login must work on multitenant applications

[giovaneliberato]

Any possible solution? I want to contribute :)

we can interpolate with "application" on app.yaml.. but how about custom domains?

[renzon]

Look at this documentation: https://cloud.google.com/appengine/docs/python/appidentity/

[renzon]

Currently the url defined on settings is used to redirect the user to a page after signing in with Facebook or Passwordless:

https://github.com/renzon/tekton/blob/master/backend/appengine/routes/login/passwordless.py#L22

https://github.com/renzon/tekton/blob/master/backend/appengine/routes/login/facebook.py#L23