To create a new chatbot you need to have an account in Telegram. Than you can follow these steps:
Enter @BotFather in the search field in Telegram.

Activate work with this chatbot using the /start command. You can send this command in private messages or click on the [/start] button.

Send /newbot ****command to private messages or click on it in the message menu.

Next, following the bot instructions enter a new chatbot name and username.
<aside> 📢 Attention: The username must contain a [bot] particle at the end.
</aside>

In response BotFather sends a token that will be used later as a link to the chat.

Follow the link to a chat. There will be an empty window with the created chat.

After successful bot creation follow this instruction Register chatbot in Creatio.