Usage is calling the script with an argument that is a mac address or partial mac address to search for like this

./ 68:cd


./ 00:27:13:68:ce:9c

and the output will be something like

00:27:13:68:ce:9c is found on port Gi 0/1


Your Mac Address Was Not Found

In order for it to work you have to set two variables at the top of the script for the switch username and password.