I have forget my past password how can I change it without confirming

Assuming that you mean your AppleID password; (which you needed to login and post here) …

… see these instructions:

Change your Apple ID password - Apple Support

Note that if you’re resetting using a password/passcode protected Trusted Device, you DO NOT need to know the current password to perform the reset.

Hello,

This Apple article has instructions for what to do if you have forgotten your password --> If you forgot your Apple ID password - Apple Support

or go directly to this link --> http://iforgot.apple.com/

If you still need help:

Contact Apple for help with Apple ID account security "This article provides country-specific Apple Support contact information for customers seeking help with their Apple ID password or other security-related issues." --> Contact Apple for help with Apple ID account security - Apple Support

If you find you can’t sign in, reset your password, or receive verification codes, you can request account recovery ( How to use account recovery when you can’t reset your Apple ID password - Apple Support ) to regain access to your account. Account recovery might take a few days or longer, depending on the specific account information you can provide to verify your identity.