Unable to get my password for the remote management part of ipad update

i updated my ipad, and when it told me to put in my username and password. i’ve had the same password on the device since i got it. but it claimed i used an incorrect one. i used the other passwords i’ve ever had on my phone. both are connected to the same icloud, can i use my phone to get the password?

i tried changing my icloud password on phone but it still didn’t work.