- Navigate to Connect > OAuth2 Credentials.
- Select the project you want the credential associated with or select * to create a credential that may be used by all projects.
- Click the Add… button and select GOOGLE_EXTENDED.
- Give the credential a name.The name must be unique within the project.
- Open the JSON file you received when you created the Service Account Key and copy and paste the contents into the Google Service Account JSON field.
- Press the Create button.