1. Navigate to Connect > OAuth2 Credentials.
2. Select the project you want the credential associated with, or select * to create a credential that all projects may use.
3. Click the Add OAuth2 Credential button.
4. Configure the credential settings:
   1. Enter a unique NAME for the OAuth2 Credential.
   2. Select GOOGLE_EXTENDED for the PROVIDER.
5. Open the JSON file you received when you created the Service Account Key.
   1. Copy the contents of the JSON file.
   2. Paste the contents into the GOOGLE SERVICE ACCOUNT JSON field.
6. Click SAVE.