Calling third party person by @

Question. For example, there is an article that states: • "If you have problems, contact user X." It would be great to add a way to call or follow the link given by the user (who is indicated), or perhaps even better by the creator of the article, to go to a Telegram chat, open an email, or another method of communication (and there can be an infinite number of them). Thus, in complex articles in which it is necessary to contact a third party to clarify information, there would be a convenient function to go to the communication channel with him. There are nuances here. 1. Let's say the user is present on the wiki. You can add @username to invoke a communication channel with the user. Here, apparently, the user himself must add the parameter "preferred communication method" 2. Otherwise, the creator of the article, in my opinion, can determine this method of communication by calling the URL address, where you can either get a link to the cha…