Visit https://merchants.google.com/mc/users and select the account you want to onboard in the top right corner.
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Click the Add person button.
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Enter your Accessium Service Account email address in the Text Field. Your service account email is on the App Onboarding page, but is <your domain>@accessium-io.iam.gserviceaccount.com.
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Check the Admin Box and click the Add user button in the bottom right corner of the screen.
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You should now see the service account in your list of users, with the status Verified.
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Return to Accessium and click Validate. Accessium will find the connected accounts for you to onboard.
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