NO LOG OUT OPTION (Switching Accounts)

It has been SEVEN years since this game came out and not one riot employee thought it was a smart idea to put a log out option in the game?! We have to log in to have access to our clients but to log out the game we press X on the top corner. You know how annoying it is when you want to switch accounts, you gotta close the client, re-open client, change username and password then your in your other account, when a SIMPLE and EASY solution is to just have a log out button. I've asked for this before and got ignored. PLEASE put a Log out button into the client!