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@Poolitzer


if data.data == "cancel_login":
    welcome(update, context)
    update.effective_message.delete()
    del context.user_data['login']
    del context.user_data['password']
    return ConversationHandler.END
this is in callback_handler


@user_language
def go_menu_timetable(update, context):
    print(context.user_data)
    update.effective_message.reply_markdown(_("msg_credentials_login"), reply_markup=inline_cancel_menu())
    return TYPING_LOGIN

@user_language
def get_auth_login(update, context):
    message_id = update.effective_message.message_id-1
    chat_id = update.effective_message.chat_id
    login = update.effective_message.text
    context.user_data['login'] = login
    context.bot.delete_message(chat_id=chat_id, message_id=message_id)
    update.effective_message.reply_markdown(text=_("msg_credentials_pass", params=[context.user_data['login']]), reply_markup=inline_cancel_menu())
    return TYPING_PASS

@user_language
def get_auth_pass(update, context):
    message_id = update.effective_message.message_id - 1
    chat_id = update.effective_message.chat_id
    context.user_data['password'] = update.effective_message.text
    context.bot.delete_message(chat_id=chat_id, message_id=message_id)
    text = _("msg_credentials_is_correct", params=[context.user_data['login'], context.user_data['password']])
    update.effective_message.reply_markdown(text, reply_markup=inline_cancel_menu())
    return ConversationHandler.END

this is callbacks for conversationhandler


auth_conv_handler = ConversationHandler(
    entry_points=[MessageHandler(Filters.regex(_("cmd_timetable", locale="all")), go_menu_timetable, pass_user_data=True)],
    states= {
        TYPING_LOGIN:[MessageHandler(Filters.text, get_auth_login, pass_user_data=True)],
        TYPING_PASS:[MessageHandler(Filters.text, get_auth_pass, pass_user_data=True)]
    },
    fallbacks=[CallbackQueryHandler(callback_handler)]
)
dp.add_handler(auth_conv_handler)

this is conversation handler