You'll want to login using an official Google account (i.e. if this is for your company, use the comapany Gmail account vs. a personal one.)
When logging in, you might be prompted to verify the account; if so, enter your cell number to get a verification e-mail or phone call.
Once verified, you'll have to agree to the terms of service; do that, and click continue.
These are my notes basically. At first i created this gist just as a reminder for myself. But feel free to use this for your project as a starting point. If you have questions you can find me on twitter @thomasf https://twitter.com/thomasf This is how i used it on a Debian Wheezy testing (https://www.debian.org/releases/testing/)
Discuss, ask questions, etc. here https://news.ycombinator.com/item?id=7445545