Add UI to activate login with eventyay ticket

[lcduong]

This PR closes/references issue #XX. It does so by:

• Add SSO form under organizer config.

How has this been tested?

Checklist

• [x] I have added tests to cover my changes.

Summary by Sourcery

This pull request introduces a new feature that allows organizers to enable Single Sign-On (SSO) with Eventyay tickets. It includes the addition of an SSO form in the organizer configuration, enhancements to the OAuth2 adapter and provider to support dynamic provider IDs, and updates to the login URL handling.

• New Features:
  • Added a Single Sign-On (SSO) form under the organizer configuration to enable login with Eventyay tickets.
• Enhancements:
  • Enhanced the EventyayTicketOAuth2Adapter to dynamically set the provider ID based on the session or default to 'eventyay'.
  • Updated the CustomSocialAccountAdapter to support subproviders by looking up by provider_id.
  • Modified the EventyayProvider to initialize with the correct SocialApp based on the event organizer.
• Tests:
  • Added tests to cover the new SSO functionality.

[lcduong]

There's a SSO client config form in organizer setting, if this key is filled, 'Login with Eventyay-ticker' will be shown in login page.

[sourcery-ai[bot]]

Reviewer's Guide by Sourcery

This pull request introduces a new SSO feature allowing users to log in with Eventyay tickets. It includes a new form in the organizer configuration, enhancements to the OAuth2 adapter and provider classes, and updates to the login templates to support this functionality.

File-Level Changes

Files	Changes
src/pretalx/orga/views/organiser.py src/pretalx/orga/forms/sso_client_form.py src/pretalx/orga/templates/orga/organiser/detail.html src/pretalx/orga/templates/orga/organiser/organiser_sso.html	Introduced new SSO form under organizer configuration, including form handling, validation, and template rendering.
src/pretalx/sso_provider/views.py src/pretalx/sso_provider/providers.py	Enhanced OAuth2 adapter and provider classes to support dynamic provider IDs and session-based initialization.
src/pretalx/common/templates/common/auth.html	Updated login template to support dynamic login URLs based on event organizer.

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[mariobehling]

@sourcery-ai review

[lcduong]

Hi @hongquan, could you help me to review again, some comment can not be fixed because I customize the lib allauth for our service, using same socialapp for app organization

[mariobehling]

As part of this issue on the login screen we also need to change the following text.

You do not need an account to view the event, or submit feedback, or receive schedule updates. You’ll only need an account if you participate in the event as speaker or as an organiser.

Change to: If you already created a proposal for a different event on this server, you can re-use your account to log in for this event. You do not need an account to view the event, submit feedback, or receive schedule updates. An account is only necessary if you want to create your own personalized schedule, or if you are participating in the event as a speaker or organizer.

[odkhang]

As part of this issue on the login screen we also need to change the following text.

You do not need an account to view the event, or submit feedback, or receive schedule updates. You’ll only need an account if you participate in the event as speaker or as an organiser.

Change to: If you already created a proposal for a different event on this server, you can re-use your account to log in for this event. You do not need an account to view the event, submit feedback, or receive schedule updates. An account is only necessary if you want to create your own personalized schedule, or if you are participating in the event as a speaker or organizer.

Hi @mariobehling, message is changed