Just in case anyone is interested, below is the responce from Remedy support:
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It will return a AccessNameID object which you can call toString() from to get the
password. For example:
If my ARServerUser object was called "context", you would use the following:
String pass = context.getPassword().toString();
Keep in mind, this is NOT pulling the User's password from the database (User form). This
is simply retrieving the password that was passed into the ARServerUser object (context)
constructor when it was created. So if the ARServerUser object was created as follows:
ARServerUser context = new ARServerUser("Demo", "pass", "", "terp");
Then the code above would return "pass". This may or may not be the correct password for
that user.