## To Reproduce Create a POSTGRESQL function ``` CREATE OR REPLACE FUNCTION challenge_user( _challenged uuid ) RETURNS BIGINT AS $$ DECLARE v_match_id BIGINT; BEGIN ... END ``` Call it: ``` var task = Supabase.database.Rpc("challenge_user", {"_challenged": null}) await task.completed ``` ## Expected behavior Get return value in `task.data` ## Actual Bbehavior Program stops with error: ``` Invalid call. Nonexistent function 'is_empty' in base 'float'. ``` on [this](https://github.com/supabase-community/godot-engine.supabase/blob/4.x/addons/supabase/Database/database.gd#L60) line