Creating a Gmail Add-on실습으로 이동
Worth mentioning that it takes some time for the Admin Console to fully provision services. At the beginning, I could not access any service (gmail, script editor), I had to wait a few minutes and logout/login (one of the two did the trick, or both).
A high-level sense of what's involved in adding an Add-On to Gmail.
the link to launch app script wasn't working so I had to use my own test account. I was given an error that I didn't have access to google docs even though I did.