To log in to the Atlas VPN website, all you need to do is visit the account page, enter the email address of your account, and click the Log in button.
Afterward, open your email inbox. You will receive an email with the subject line: Device sign-in confirmation. Once you open the email, click the Complete sign-up button.
And that is it! You will be logged in on the same window where the blue Confirm sign-in button was presented.
Note: if you are not getting the sign-in emails, follow the steps in this troubleshooting guide.
If you wish to log in to the Atlas VPN website on a different window, copy the sign-in code attached at the bottom of the letter.
Head back to the Atlas VPN tab where you have entered your email, and click on Or use sign-in code.
Then, paste the sign-in code, click the blue Submit code button, and you will be logged into your account.