UserList of CRM users provided by the advertiser.

[Proto definition ![GitHub](https://developers.google.com/site-assets/logo-github.svg)](https://github.com/googleapis/googleapis/blob/master/google/ads/googleads/v26/common/user_lists.proto)

| Fields ||
|---|---|
| ## `app_id` | `string` A string that uniquely identifies a mobile application from which the data was collected. For iOS, the ID string is the 9 digit string that appears at the end of an App Store URL (for example, "476943146" for "Flood-It! 2" whose App Store link is <http://itunes.apple.com/us/app/flood-it!-2/id476943146)>. For Android, the ID string is the application's package name (for example, "com.labpixies.colordrips" for "Color Drips" given Google Play link <https://play.google.com/store/apps/details?id=com.labpixies.colordrips)>. Required when creating CrmBasedUserList for uploading mobile advertising IDs. |
| ## `data_source_type` | `https://developers.google.com/google-ads/api/reference/rpc/v26/UserListCrmDataSourceTypeEnum.UserListCrmDataSourceType` Data source of the list. Default value is FIRST_PARTY. Only customers on the allow-list can create third-party sourced CRM lists. |
| ## `upload_key_type` | `https://developers.google.com/google-ads/api/reference/rpc/v26/CustomerMatchUploadKeyTypeEnum.CustomerMatchUploadKeyType` Matching key type of the list. Mixed data types are not allowed on the same list. This field is required for an ADD operation. |