Reset iCloud password on Mojave
Are you having trouble getting your iCloud account to go online after updating your iOS devices to 12.4, your Mac to 10.14.6, or just your AppleID password? I was, too. I read through the articles here in communities but found them to not have a simple, easy way to do so.
Short and sweet: On your Mac go to System Preferences, Internet Accounts, click the + icon bottom left, click on ICloud in the right pane, then just add in your AppleID and password, and voila', you're there!
I think Accounts doesn't allow one to have two instances of the same email address so it simply updates the password to the (correct) one you entered for your AppleID.
I hope this is helpful!
MacBook