Follow these steps to add Tamago-DB to the Trusted Apps Whitelist of your Google GSuite.

Log in to the Admin console of your Google GSuite :

From the Admin console Home page, go to Security 

Scroll down to API Permissions, this is most likely the last one in the list.

Once opened, scroll to the bottom of the list of apps, click the Trusted Apps link.

Click Whitelist an App Add  on the bottom right.

The Add App To Trusted List window opens

In the Select App Type list, select Web applications, this will show an OAuth2 Client ID field.

Add the following ID to the OAuth2 Client ID field :

Make sure there are no extra spaces in front or behind the ID when copy pasting!

Click ADD, and the Tamago-DB app should now be listed as a Trusted App!