Search Douyin DOU+ user

Searches Douyin users in the DOU+ delivery context, by Douyin ID / nickname. Send keyword (Search keyword (Douyin ID / nickname)); optional count, cursor. Returns matched user list (nickname, Douyin ID, sec_uid, follower count, etc.) plus cursor / has_more. cursor: Pagination cursor, 0 for first page, then pass the cursor from the previous response. Supports cursor pagination.