iCloud password is not working to update apps

I am not able to update my apps because it keeps saying password is incorrect. I know password is correct because I’m able to log on everywhere else. I have signed out of iCloud/ closed the App Store and restarted my iPad. But its still saying the same thing- it will not recognize my password and allow me to update my apps. As a result my work is not being saved on iCloud and I’m very worried about this.