Add support for stable MSC2858 API (#9617)

The stable format uses different brand identifiers, so we need to support two
identifiers for each IdP.

1 files changed, 1 insertions, 0 deletions

diff --git a/synapse/handlers/cas_handler.py b/synapse/handlers/cas_handler.py

index 04972f9cf0..cb67589f7d 100644
--- a/synapse/handlers/cas_handler.py
+++ b/synapse/handlers/cas_handler.py
@@ -83,6 +83,7 @@ class CasHandler:
         # the SsoIdentityProvider protocol type.
         self.idp_icon = None
         self.idp_brand = None
+        self.unstable_idp_brand = None
 
         self._sso_handler = hs.get_sso_handler()