Apple PW on iPhone & MacAir

What happens when you try to use the password? Error message(s)?

If you have changed your password, have you followed the steps in this article?

What to do after you change your Apple ID or password - Apple Support.      

You are welcome. Some things you can try. Do you have access to another WiFi network where you can try? That has worked for several people.

Try a restart.

Restart your iPhone, iPad, or iPod touch         

Try a forced restart.

Reset Device.      

If necessary

Hard reset.        

Do a backup and try a factory reset. Then restore from your backup.

Restore to Factory setting.      

Restore - If you see an error when you update or restore your iPhone, iPad, or iPod

Backup - Restore your device from an iCloud or iTunes backup.