Learn how to allow users of your organization to connect to Gmail
> Enable Google Cloud Platform (with your GSuite account logged in)
> Add a new project (can be named “EducationLink Integration”).
> Enable Gmail API for your new application.
> Create an “Internal” OAuth consent screen.
> Create new application under OAuth consent screen.
> Application type “Web application“
> Under “Authorised redirect URIs”, add 2 URIs:
> After “Save”, Google will provide you “Client ID” and “Client secret“.
> Copy and paste “Client ID” and “Secret” to Gmail add-on settings.
Now, users in your organization can connect to their Gmail accounts.