iTunes and the App Store on my iPad have suddenly stopped accepting my AppleID password. I can't log in to update apps

I'm unable to log into the App Store. When I type in my AppleID it just doesn't accept it. This means I'm unable to update any of my apps so I can't actually use anything!!! Please help!! I've tried resetting it but it doesn't do anything. I'm also unable to update my iOS and log into iTunes!!!!! 😠😮😟