savePreparedKeyboardButton
Stores a keyboard button that can be used by a user within a Mini App. Returns a PreparedKeyboardButton object.
Parameters
user_idIntegerRequiredUnique identifier of the target user that can use the button
A JSON-serialized object describing the button to be saved. The button must be of the type request\users, request\chat, or request\managed\bot.
Returns
On success, the PreparedKeyboardButton object is returned.