Request message for `https://developers.google.com/google-ads/api/reference/rpc/v25/ReachPlanService/ListPlannableUserLists` that lists the available user lists for a customer.

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

| Fields ||
|---|---|
| ## `customer_id` | `string` Required. The ID of the customer. |
| ## `customer_reach_group` | `string` The name of the customer being planned for. This is a user-defined value. |
| ## `reach_application_info` | `https://developers.google.com/google-ads/api/reference/rpc/v25/AdditionalApplicationInfo` Optional. Additional information on the application issuing the request. |