Letting another user log in with Keyy

I have a site that uses Keyy login, and it works without issue between my Samsung devices. I tried to add another user to the Keyy login, so that she can do work on the site that I built for her, but when she downloaded the app on her Iphone, it didn’t allow her to log in on her laptop, but instead, directly on her phone. On top of that, once I clicked disconnect to let her scan the code with her phone, so that she could be connected, the login scan option for that particular site disappeared completely from the app on my phone, leaving me with no way to login myself, until I scanned the code (that was on her phone screen) with my phone. I was not able to log in while she was logged in, either. I have since given her a username of her own, but I don’t see any instructions for enabling multiple users at once. It only says “have users log in”. I don’t have premium, but would like to get some instructions on how to manually add users so that both of us can log in without issues, and easily edit the content on my site. How can I do this? Thanks!