Powershell script- password information

Forgive me I am still new to scripting.

I made the script below to verify password information. However, I want multiple people here to user it. So I would like to make the "username" field a fill in the blank spot. That means that we are prompted to put in a username when running the script. How can I changed my script to do this?

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Import-Module ActiveDirectory

get-aduser -identity username -properties passwordlastset,passwordexpired,lockedout,"msDS-UserPasswordExpiryTimeComputed" |

Select-Object -Property "SamAccountName",passwordexpired,lockedout,passwordlastset, @{Name="Password Expiry Date"; Expression={[datetime]::FromFileTime($_."msDS-UserPasswordExpiryTimeComputed")}} |

Format-Table