The following variations to Jomres REST API method for adding new booking would simplify a lot the migration from legacy booking system ->Jomres 1)accepting room type instead of room number, Jomres already works in that way in a frontend reception booking, so you must have some function/method already doing it, that you could cut and paste. 2)set username in booking to be created as the username passed as parameter in POST https://github.com/WoollyinWalesIT/jomres/issues/152