Registering Application in Google Cloud Console

To register an application in the Google Cloud console, do the following:

1. Sign in to the Google Cloud console under a Google account that you want to use for sending emails.
2. Create a new project and enable the Gmail API for the project.

You can do this with the Google setup tool.

3. In the Google Auth Platform section, configure the Branding, Audience, and Data access settings for your project.
4. In the Clients section, create the OAuth 2.0 client ID credentials — a client ID and client secret for the custom application.
5. Record the following data required for acquiring an access token:

• Client ID
• Client secret