Send documentId on create record for firebase connector

Hi, i am using firebase connector, and on create a new record, there is no way of sending a specific documentId for the document created. the id is set in the connector config, and it works for get record (you have to specify it), but not on create record. i can create a REST API to do this all over, but it would have been perfect if the firebase connector could give this option directly. it should be an optionnal field.
or maybe i missed something ?
thank you !