Options for Bot.savePreparedKeyboardButton.
button must be a KeyboardButton of the type request_users, request_chat, or request_managed_bot.
button
Telegram Bot API: savePreparedKeyboardButton
A KeyboardButton object describing the button to save.
Unique identifier of the target user that can use the button.
Options for Bot.savePreparedKeyboardButton.
Remarks
buttonmust be a KeyboardButton of the type request_users, request_chat, or request_managed_bot.See
Telegram Bot API: savePreparedKeyboardButton