Can’t sign in – Zee - A Munzee Companion App Review

I just started using Munzee. My grandpa has been using it for almost three years and I have had fun getting some with him. I finally downloaded it for myself and got a lot of points on my first day. I downloaded Zee and it will not let me sign in and I am very upset about that. Not sure what to do.
Review by Brewers_Yeli-22 on Zee - A Munzee Companion App.