setChatAdministratorCustomTitle

Use this method to set a custom title for an administrator in a supergroup promoted by the bot. Returns True on success.

Parameter	Type	Required	Description
chat_id	Integer or String	Yes	Unique identifier for the target chat or username of the target supergroup (in the format @supergroupusername)
user_id	Integer	Yes	Unique identifier of the target user
custom_title	String	Yes	New custom title for the administrator; 0-16 characters, emoji are not allowed