Get Ayrshare Sso Url

Generate a JWT SSO URL so the user can link their social accounts.

The per-user Ayrshare profile key is provisioned and persisted as a standard is_managed=True credential by :class:~backend.integrations.managed_providers.ayrshare.AyrshareManagedProvider. This endpoint only signs a short-lived JWT pointing at the Ayrshare- hosted social-linking page; all profile lifecycle logic lives with the managed provider.