Fix: bug creation user si CAS non activé

app/auth/models.py

@@ -416,7 +416,7 @@ class User(UserMixin, ScoDocModel):
             args, excluded={"cas_id", "user_name", "roles_string", "roles"}
         )
 
-        new_cas_id = args.get("cas_id")
+        new_cas_id = args.get("cas_id", "").strip() or None
         if ScoDocSiteConfig.cas_uid_use_scodoc():
             new_cas_id = self.user_name
         else: