you will make me cry 

Hi i logged into the server for the first time in a few days at around 11am (UTC+10) and had no issues ... then the server was shut down and since coming back online at about 12:30 pm  i keep getting a message that says " you are not whitelisted on this server "

after using some google-fu ( seeing as i am still fairly new to the minecraft world ) it seems that this is not a banning as that would be blacklisted and i find it hard to believe that this is even a whitelist server

sorry if my inexperience means i am missing something but is there anyway for me to get back on the server ?