Sadly as @PhilipDAth mentioned there is no easy way. Submit a feature request for the future but that won't help you now sorry. While most people use some form of authentication service i.e. Radius or LDAP they probably haven't bothered, that said I don't think it would be hard for them to implement and doing so would give SMB customers who don't have auth servers options.
Give the job to someone as punishment?
Meraki CMNO, Ruckus WISE, Sonicwall CSSA, Allied Telesis CASE & CAI