Go to business.google.com, your screen should look something like this.
Click Users on the left.
Click the Add User icon in the top right of the pop up box.
Add us to your account by entering the email address of your account manager or use email@example.com
If you are on an SEO or PPC marketing plan...
Because Google limits the number of accounts under one user, please grant us Owner permissions so that we are able to sync your GMB to other Google accounts (Analytics, Data Studio, Console, Ads, etc).