fix: use default redirect uri when not passed

pkg/oidc/session.go

@@ -4,6 +4,7 @@ package oidc
 //https://openid.net/specs/openid-connect-rpinitiated-1_0.html#RPLogout
 type EndSessionRequest struct {
 	IdTokenHint           string `schema:"id_token_hint"`
+	ClientID              string `schema:"client_id"`
 	PostLogoutRedirectURI string `schema:"post_logout_redirect_uri"`
 	State                 string `schema:"state"`
 }