I am going to test IAB for my Android app. I uploaded the release signed apk to alpha slot and I created a product that is flagged as active.
Now I need to test the IAB in-app purchase workflow for a managed product with a test account (static responses were ok). I see that I should create a Google+ community or a Google group but documentation says I just need to have a list of email accounts.
I have a second Google account, different from my developer account, to use as IAB testing Android user: my device has this user onboard. Although it is a Google+ account it is not a gmail account.
Is it mandatory that the email is a gmail account?
Where do I have to put that email address in developer console if I do not want to create a group or a community?