Since this shows up as a failed command, you could just do a blank
search to pull up all of your devices and then cancel failed commands.
Action -> Cancel Management Commands -> Cancel All Failed Commands
You can create a Webclip with the address as
'smb://insert_fileshare_name', which will open the Files app and ask you
to authenticate. In my really limited testing, the Files app appears
store the credentials used, so students would only need to tap ...
It looks like you are just sending a 'curl' rather than sending a POST -
https://developer.jamf.com/jamf-pro/reference/createcomputercommandbycommandandid