'Sorry! Make sure you are online and try again.' and 'No connection'

i wanted to play minecraft but a problem occurred when i tried joining a server me and my friends play on it said minecraft authentication server are down so i closed my game and opened the launcher it said 'No connection' under my username and instead of play it said play offline so i reset my modem restarted my PC turned off firewall reconnected my wifi and then reinstalled mc and after reinstall i tried logging in it said 'Sorry! Make sure you are online and try again.' i tried everything again and still no difference can someone please help me