Every amoCRM account has a unique API key which you need to use to integrate it with Hoversignal.

Click on the picture in the upper left corner:

Click on "Profile":

Copy your API key:

Then visit "Integrations" page on Hoversignal:

Choose amoCRM, enter your account address and login in the fields, paste your API key and click on "Save":

 

Select the widget and click on "Edit":

Move to the "Integrations"(1) tab and activate the integration(2):