how to cancel password and pin in lock screen I tried everything and it didn't work

If this is related to Windows-see below. If it is a phone issue-you might need to refer to manufacture instructions on factory reset.
If this is a Windows PC with a Microsoft account: on the lock screen select Sign‑in options → Password or I forgot my PIN, then verify your Microsoft account (email/SMS) to reset the PIN or password and sign in again.

If it’s a local account and you can’t remember the password/PIN: use the “Forgot password” option (security questions), or sign in with another admin account if available; otherwise you may need Windows recovery/reset to regain access (this can remove apps/files).