Can't link user without username and with forwarded messages privacy enabled

[r4rdsn]

If a user doesn't have a username and disabled the ability to add links to their account when forwarding their messages: , then markdown link of this user sent by bot will be inactive: .
This results in inability to contact such users when they create order. The proposed solution for now is to send message to all users without username when they start order creation that they should have forwarded messages privacy disabled if they want to be contacted.