App store incorrect password
I've been wanting to download apps on my mac that I bought a couple of weeks ago (late 2013 model) but every time I try to put in my password for my iCloud account, it's saying it's wrong? I've even changed the password and it's still not working! I'm lost at what to do as the password if definitely right as I'm getting verifications on my phone.
iMac 21.5″, OS X 10.11