Hi , what is the methods that bans a user

along with all his sent messages ?

bot api or mtproto?

bot api

To my knowledge there is no such method for the bot api

that's unfortunate , is there an alternative way i can use ? like get all the user messages and use the delete method

Okay, I was wrong. Check https://core.telegram.org/bots/api#banchatmember >revoke_messages

according to the description .. revoke messages means that the user cannot read the previous sent messages

Huh? "Pass True to delete all messages from the chat for the user that is being removed. "

the default is true , i didn't specify it .. however all the messages doesn't got deleted

Is it a supergroup or an "old" regular group?

according to the updates it's a supergroup

Okay, then the "revoke" means if the user still got access to the messages or not.

If False, the user will be able to see messages in the group that were sent before the user was removed.