Even if you’ve already set up service accounts for your solutions, you can still create a new service account key here if you’d like to switch to managing your service account keys directly in the Merchant Center. See the Retrieve a service account key for authentication section of the Get Started guide for more details.
Note: This feature does not remove the other ways to create and manage Content API authentication. If you’d prefer to manage your Google API Console project and service accounts yourself, you can still follow the steps in the Service Accounts guide. If you are accessing others’ Merchant Center accounts using OAuth 2.0, you’ll still want to follow the steps in the Authorize Requests guide instead of using service accounts.
If you have any questions or feedback about the new service account management in the Merchant Center, or any other questions about the Content API for Shopping, please let us know on the forum.