The identifier for Google Ads account.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v25/resources/product_link.proto)

| Fields ||
|---|---|
| ## `customer` | `string` Immutable. The resource name of the Google Ads account. This field is required and should not be empty when creating a new Google Ads link. It is unable to be modified after the creation of the link. |