Connect to AWS using Putty

So, I am trying to install wordpress on AWS to use it as a hosting for my new website (Want to try this out, instead of GoDaddy Multisite). Followed instructions to the T (used Putty Key Gen, created private key etc.) but when it came to connecting to the server itself, kept getting the following error

Not sure on what to do, tried to use user as “root”

Voila! the system told me to use “ec2-user” as the user and I was in!

P.S – This is the tutorial I have been following: