newborn sleeping?

hi all so my son is 6 days old and we have been trying to place him in the pack n play or bassinet to sleep at night. It has been a lot harder since he will stay in them during the day but at night he rather sleep in the auto rock n play sleeper. is anyone else's baby sleeping in the rnp? I dont plan to keep in there, I plan to transition him to pack n play or bassinet but right now I think with his stomach he prefers rnp.