Connection failed on own server


So I got my server setup on a VPS but when anyone wants to join they get the message shown in the picture.
does any of u guys know how to get that fixed

do you have steam open?
Did you enter your steam api key in the server.cfg?

Please give us more information on what you have tried so we can offer other solutions sir.

i had a typo in my API key xD thanks for pointing api key out