If you have forgotten your iCloud password, you can just use the Apple My Apple ID service for resetting password. Just open a browser and enter “appleid.apple.
If, on your Apple ID page, you see your iCloud.com address listed just below your Apple ID email address, then it is, in fact, the same as your Apple ID, and as for passwords, it is the same password
How to Recover a Forgotten iCloud Mail Password · Now click on the Reset My Password button and type in your Apple account id again. · Click Next · Enter your ...
How to Change Your iCloud PasswordGo to the Apple ID page.Log in to your account with your Apple ID email address and current password. ...On your account screen, go to the Security section and choose Change Password.Enter the current Apple ID password you want to change