refactor: Represent route auth information in the type system

src/api/client/openid.rs

@@ -16,7 +16,7 @@ pub(crate) async fn create_openid_token_route(
 	State(services): State<crate::State>,
 	body: Ruma<account::request_openid_token::v3::Request>,
 ) -> Result<account::request_openid_token::v3::Response> {
-	let sender_user = body.sender_user();
+	let sender_user = body.identity.sender_user();
 
 	if sender_user != body.user_id {
 		return Err!(Request(InvalidParam(