Required. The ad client which owns the collection of url channels. Format: accounts/{account}/adclients/{adclient}

The maximum number of url channels to include in the response, used for paging. If unspecified, at most 10000 url channels will be returned. The maximum value is 10000; values above 10000 will be coerced to 10000.

A page token, received from a previous ListUrlChannels call. Provide this to retrieve the subsequent page. When paginating, all other parameters provided to ListUrlChannels must match the call that provided the page token.