fromosimportgetenvfromenumimportEnumimportloggingfromtelegramimportUpdate,Botfromtelegram.extimportApplicationBuilder,CommandHandler,ChatJoinRequestHandler,ConversationHandler,MessageHandlerfromtelegram.extimportUpdater,ContextTypes,filterspassphrase=r"I want to join the channel"TOKEN=getenv('TELEGRAM_BOT_TOKEN')logging.basicConfig(format='%(asctime)s - %(name)s - %(levelname)s - %(message)s',level=logging.INFO)classStates(Enum):WAITING_FOR_VERIFICATION=1asyncdefstart(update:Update,context:ContextTypes.DEFAULT_TYPE)->None:awaitupdate.message.reply_text(f'I am the bot, type me something!')# Processing user's join requestasyncdefjoin_request(update:Update,context:ContextTypes.DEFAULT_TYPE):logging.info(f"Captured attempt of user to join the group.\n\tUser :{update.effective_user.id}\n\tGroup:{update.effective_chat.id}")# sending user a private messageawaitcontext.bot.send_message(chat_id=update.effective_user.id,text=f"Dummy captcha. Just respond '{passphrase}' (without brackets) to this message"    )# Store chat join request details in context for later usecontext.user_data['join_request_chat_id']=update.effective_chat.idcontext.user_data['join_request_user_id']=update.effective_user.idreturnStates.WAITING_FOR_VERIFICATIONasyncdefverify_user_response(update:Update,context:ContextTypes.DEFAULT_TYPE):logging.info(f"Verification state triggered")logging.info(f"Update details:{update}")logging.info(f"Context user data:{context.user_data}")user_response=update.message.textlogging.info(f"Captured responce of user :{update.effective_user.id}\n\tResponce:{user_response}")ifuser_response==passphrase:# Approve join request using stored detailsawaitcontext.bot.approve_chat_join_request(chat_id=context.user_data['join_request_chat_id'],user_id=context.user_data['join_request_user_id']        )awaitupdate.message.reply_text("Verification successful! You'll be forwarded to group now.")logging.info(f"User passed the verification and added to group:\n\t{update.effective_user.id}")returnConversationHandler.ENDelse:# Decline join requestawaitcontext.bot.decline_chat_join_request(chat_id=context.user_data['join_request_chat_id'],user_id=context.user_data['join_request_user_id']        )awaitupdate.message.reply_text("Verification failed. You cannot join the group.")logging.info(f"User FAILED the verification and NOT added to group:\n\t{update.effective_user.id}")returnConversationHandler.ENDif__name__=='__main__':default_bot=Bot(TOKEN)logging.info("Succesfully retrieved token")app=ApplicationBuilder().bot(default_bot).build()logging.info("Succesfully created application")# Create a handler for private mesage to userconv_handler=ConversationHandler(entry_points=[ChatJoinRequestHandler(join_request)],states={States.WAITING_FOR_VERIFICATION: [# Only plain text, no edited messages, no commands in privat conversationMessageHandler(filters.TEXT&~filters.COMMAND&~filters.UpdateType.EDITED_MESSAGE,verify_user_response)            ]        },fallbacks=[]    )# Commandsapp.add_handler(CommandHandler("start",start))# Conversationsapp.add_handler(conv_handler)# Finally run!app.run_polling(allowed_updates=Update.ALL_TYPES)