Needs login

I have installed the plugin and I’m trying to get the following sheet to load on my page but its just loading a log in page?

ive read the FAQ but can’t understand what to do to fix this.

https://docs.google.com/spreadsheets/d/15zUcugcBXA4vo0EWIfkvrwKJW1G12SC_iAZGXi-unW8/edit?usp=sharing

thanks, Sam