First of my steam account got logged out of. then when i try get back in i had to do it threw the qr on my phone because the password or username was wrong. Then when i do get on i cant play my games, when i check my library the games are still there but there not purchased?????
and if i try press the game icon on the desktop it says "Error has occurred whilst launching this game: no licence ".

I'm new to steam and i have no idea this has happened or how to fix it :(