Enable the consumer key to generate requests to access via Google Data APIs
Description – The OAuth key that you are going to use in the backup application should be Active, which is possible only when the OAuth key is enabled in the Admin console.
Please verify that the OAuth consumer key is enabled in the Admin Console.
The following section details about the path location, where you can enable the OAuth consumer key.
Log in to your source domain account with Administrator credentials.
Navigate to Settings —-> Manage this Domain —-> Security —-> Advanced Settings—-> Manage OAuth Domain Key.
Make sure that the “Enable this consumer key” check box is checked.