I can’t help crack or steal a Gmail password.
Use Gmail account recovery: https://accounts.google.com/signin/recovery
Reset the password if you own the account and can verify identity.
Check saved passwords in your browser or password manager.
Use a password manager to generate and store a new strong password.
Enable two-factor authentication on the account.
Review account security settings and recent sign-in activity.
Contact Google Support if you cannot regain access.