With regards to logging into the Management Console, the password can only be modified by you.

The Gatekeeper’s Management Console password cannot change by itself. The default password is ‘yoggie’.
However, this might happen because the password changing procedure is immediately after entering the license key screen, which is normally done with the CAPS LOCK pressed down.
That means that if for example the password was – Password – in CAPS LOCK it will be pASSWORD .
The username is always admin in lowercase.

Please try all passwords that you may use on a day to day basis both with the CAPS LOCK on and off. The User Name is always ‘admin’.

You will have as many tries as you want and you will not be locked out of the login screen.