{
  "type": "impersonated_service_account",
  "service_account_impersonation_url": "https://iamcredentials.googleapis.com/v1/projects/-/serviceAccounts/target@my-project.iam.gserviceaccount.com:generateAccessToken",
  "delegates": [],
  "source_credentials": {
    "type": "service_account",
    "project_id": "my-google-project",
    "private_key_id": "REDACTED",
    "private_key": "-----BEGIN PRIVATE KEY-----\nREDACTED\n-----END PRIVATE KEY-----\n",
    "client_email": "source@my-project.iam.gserviceaccount.com",
    "client_id": "REDACTED",
    "auth_uri": "https://accounts.google.com/o/oauth2/auth",
    "token_uri": "https://oauth2.googleapis.com/token"
  }
}