The solution specified in the limitation post(Limit of 20 Organizations on Universal Login Page Organization Picker) seems a bit weird.
How could we specify the organization url param, without knowing who the user are? The whole point of using auth0 is that auth0 takes care of the authentication of the user.
If I understand the suggested solution we need somehow find out who the user is, without using auth0, in order to present the possible organizations and then login them via the universal login?
Normally the user logs in, gets the organizer picker, and everything is handled by auth0.
I must be missing something?