Wave app aske me to sign in - what do I sign into?


I have a UCM6301. I downloaded the Wave app from the Google store, not the Wave lite.
When I open the app, it ask me to sign in. What am I signing into? My UCM6301? My Grandstream account? My phone company? I don’t know - please help.
Once I can sign in, I can (I hope) use the QR code to provision my Wave app. I just can’t get passed the sign in page.




I have the information now but, when I email myself the qr code, my wave app on the phone won’t register. I get “account registration failed.”
Why isn’t it registering? Do I have to use a particular extension or should any of them work?
Thanks for your help.