Summary: Allowed authentication methods
Lists the authentication methods with which remote users may access the desktop. There are two possible authentication methods; "vnc" causes the remote user to be prompted for a password (the password is specified by the vnc-password key) before connecting and "none" which allows any remote user to connect.
In the array, there must be one and only one while space behind the comma(,).
Or else, the default value can't be restored