first time playing league of legends, i just had downloaded it, and made an account, but when i am logging in, it says "invalid username/password combination. Please try again" but i am 100% sure my username and password is right. what can i dooo??? :(first time playing league of legends, i just had downloaded it, and made an account, but when i am logging in, it says "invalid username/password combination. Please try again" but i am 100% sure my username and password is right. what can i dooo??? :(

It's possible you registered an account on a different server. Go to the signup page: Choose the region you want to play. When opening the LoL client, choose the correct region. Use their giveaway site for free riot points and influence points.

You can try using my personal referral link to create a new account, hope it helps. :)