Retrieves marketing data insights for a given user list. This feature is only available to data partners. Authorization Headers: This method supports the following optional headers to define how the API authorizes access for the request: * login-account: (Optional) The resource name of the account where the Google Account of the credentials is a user. If not set, defaults to the account of the request. Format: accountTypes/{loginAccountType}/accounts/{loginAccountId} * linked-account: (Optional) The resource name of the account with an established product link to the login-account. Format: accountTypes/{linkedAccountType}/accounts/{linkedAccountId}