I forget my password

There's a difference between between a passCODE which is a four or six digit code used to unlock a mobile device after you turn it on, and a passWORD which is what is used to log into your Apple ID account. I am not clear as to which you are referring.

Read the Apple Support document for what to do if you forgot the passCODE on an iPhone or iPad. Click here then select your device type if necessary --> If you see an iPhone or iPad unavailable message or Security Lockout screen - Apple Support - Which one you can use depends upon your equipment configuration.

Read this support article for what to do if you forgot your Apple ID passWORD - https://support.apple.com/HT201487

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