Hey, by installing the HYPLAY SDK it forcefully adds a HYPLAY powered login in screen. It does not appear in the unity editor. I only saw it in my final uploaded build on Itch. There was no earlier indication of something like this which is why I have my own login screen after that. There isint even any code that calls HYPLAY that i shipped nor do I have a HYPLAY scene in the scene order. So it was a bit strange.
My login screen uses the whalepass sdk and its git code snippets to log the player in, it saves the login id and passes it to my custom challenge tracker script which has a custom datatype for storing a challenges ID and a string name for its title. I use this along with the player ID to deliver the challenge rewards when completed.
It was too late to figure out how to remove the HYPLAY login but you can just click through it so it was not a blocker.
Hope that clears it up, thanks for playing!