I forget my password to my desk Mac computer does anyone know how I can get login?

Hi there,

I am sorry that you have forgotten your login password.

Please follow these steps to reset your login password

Enter a password up to three times

After making sure that you're at the login window, enter any password up to three times until you see one of the password-reset options below.

Choose a password-reset option

After you enter a password up to three times, your Mac should show one of these password-reset options.

See this link for further reference https://support.apple.com/en-us/HT202860