How get telegram user info by UserID?

Question

I have a user_id like 2024211111. How i can get user info by this user_id? Tdlib api have a method called getUser , but it doesn't work with this user_id ( this user_id not in my ChatList )

Answer 1

Simple answer: This function doesn't exist . You just can know User Info through a chat previously initiated. So, you have to start a chat with this user first to call the API method mentioned. If you need to query the info later, you should store it, there is no another way that I know