

Hi,
Welcome to the Google Ads API forum channel.
In the Google Ads API perspective, visitors to your website (https://developers.google.com/google-ads/api/docs/remarketing/audience-types/website-visitors) type of userlists are usually created with a RuleBasedUserListInfo (https://developers.google.com/google-ads/api/reference/rpc/v14/RuleBasedUserListInfo) object. To retrieve them via the GAQL, you can include a condition in your query wherein the user_list's (https://developers.google.com/google-ads/api/fields/v14/user_list) user_list.type = RULE_BASED.
Regarding app users, I'm afraid that this is currently not supported yet in the API. There's already an existing feature request on this, however, we're unable to provide a timeline on when it will be available. You may follow our blog (https://ads-developers.googleblog.com/search/label/google_ads_api) and release notes (https://developers.google.com/google-ads/api/docs/release-notes) for the latest updates in the API.
I hope this helps.
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Google Ads API Team |