Solved Event for player join in .lua

Hello, im curious if their is a event for a player joining a server in rust like for example

On player join
rust.SendChatMessage(player, "Welcome back we got a new teamspeak server at 125.0.0.1")
end

im obviously useing a fake ip btw because i dont got the account upgrade to allow me to advertise the server and im assuming its aginst the rules without it