OptionalextraAdditional provider-specific parameters for logout endpoint.
Optionalid_Original ID token issued during login (recommended for OpenID logout).
OptionallocalDo not redirect to OP for logout; clear local state only.
Optionalpost_Redirect URL after logout completes.
Optionalrequest_Internal request type:
"s" → silent"p" → popup"d" → standard redirect
Options used when generating a logout request.