If you use the web browser, when you type @ and a few character of the username and then wait for a while, it will drop down a list of user with that name. I don’t think app have that function, so have to type in manually, including link.

The whole thing need to look like this:

[@waiter_bot@monyet.cc](https://monyet.cc/u/waiter_bot)

And it will appear as a link to the user @waiter_bot@monyet.cc, they will also get notified