title: I dont know how Postgresql created user on my mac
body: <p>Two days ago, i started learning postgresql. Most tutorials I followed online were either old or the codes wont just work on my mac. I followed a lot of tutorials that did a lot of totally different things.
  When i switched on my system today. I noticed Postgresql created a user on my mac. I don't know what this is or maybe i used the wrong CLI code.</p>
  
  <p><img src="https://i.stack.imgur.com/bup4L.png" alt="enter image description here"></p>
  
  <p>When I tried viewing the user, I saw this</p>
  
  <p><img src="https://i.stack.imgur.com/kLe2T.png" alt="enter image description here"></p>
  
  <p>should I delete this user or it has a function?</p>