Prompt is a list.

Author: rohe

src/oidcop/oauth2/authorization.py

@@ -970,7 +970,7 @@ def re_authenticate(request, authn) -> bool:
     """
     logger.debug("Re-authenticate ??: {}".format(request))
 
-    _prompt = request.get("prompt")
+    _prompt = request.get("prompt", [])
     logger.debug(f"Prompt={_prompt}")
     if "login" in _prompt:
         logger.debug("Reauthenticate due to prompt=login")