- Login to https://admin.google.com
- From the Home page, click Security API controls
- Under App access control, click MANAGE THIRD-PARTY APP ACCESS
- To find the Upsales app in the list, enter Upsales in the Contains field and click APPLY
- Check the box for Upsales and click Change access
- Choose the Trusted option to allow access to all Google services.
- Click CHANGE