You need a computer with the Chrome browser. Rust+ is Rust's official companion app; the bot uses it to answer game chat commands and send alarms, deaths and upkeep alerts.
On a computer, open the Chrome Web Store and add «Rust Companion Authenticator» to Chrome. The Rust+ login page is made for phones — the extension shows the token in a normal browser.
Open the Rust+ login page and sign in through Steam with the account you play on. The bot never sees your Steam password.
Copy the token from the extension and send it to the bot in one message (in the bot: 🔗 Rust+ → 🔗 Connect Rust+). The bot deletes that message from the chat right away.
Join the server, press ESC → Rust+ → Pair with server. In a few seconds the bot writes that the server is paired.
Smart alarm, smart switch, storage monitor: power it, look at it, hold E → Pair. A storage monitor on the tool cupboard shows upkeep; on a box — someone looting it.
Type !pop in team chat — the bot answers with the server's online. !help lists all commands. If the server blocks «!», use a dash: -pop, -help.