Online Subsystem Steam not working when using Developer or Shipping build (4.8.3)

Hi Online Subsystem Steam is not working after the game has been packaged however works perfectly fine when running as a standalone game in editor. The game packages fine however as soon as I run it all of the features that were previously working using standalone game in editor such as showing steam UserName etc no longer work. I have my own app ID and am able to downlaod and run the game using steam,when the game is ran using steam the overlay appears showing my achievements etc however my username just comes up as player. Help would be appreciated.