Telegram users without usernames are mentioned incorrectly

[ishevche]

Sellers without usernames are displayed incorrectly in the listing.
For such users, their user IDs are displayed where the username is supposed to be, resulting in the mention @[some numbers here]. Such mentions are parsed by Telegram incorrectly, as it treats these IDs as actual usernames.

To Reproduce
Steps to reproduce the behavior:

1. Get a Telegram account without a username.
2. Add an item using the bot.
3. In the moderator chat or channel, the seller mention is displayed incorrectly and is not traversable.

Additional
It is possible to create a link to a user using formatting: [some text](tg://user?id=), then, with the proper formatting method, "some text" will be displayed as a link to an account. With this method, there might be some issues with account privacy settings.

[Salz0]

I would suggest after the /start command to request the user to either share their phone number, if their tag isn't there