ArrayUtil unique not working

[Jalen]

I have this code that I am using in a fix script and I am trying to get an unique array. The ArrayUtils does not work. Can someone tell me whats wrong with this?

/ Get all users

var userGr = new GlideRecord('sys_user');

userGr.addQuery('sys_id', 'user sys_id);

userGr.query();

while (userGr.next()) {

    // Get all auths assigned to the user

    var userAuthGr = new GlideRecord('auth_table');

    userAuthGr.addQuery('u_user', userGr.sys_id);

    userAuthGr.query();

    while (userAuthGr.next()) {

var auths = [];

auths.push(userAuthGr.u_user_authorization.sys_id);

    }

    // Remove duplicates from the auths array

    var au = new ArrayUtil();

var list = auths.toString().split(',');

    var finAuths = au.unique(list);

gs.log(":whats in this array auth " + finAuths);

[BryGuy]

When you push to the array, be sure to pass in the value with a .toString(). I.e. 

auths.push(userAuthGr.u_user_authorization.sys_id.toString());

You have a syntax error here - an unnecessary " ' " next to the user.sys_id.

userGr.addQuery('sys_id', 'user sys_id);

[Jalen]

Only one sys_id is being displayed. Any idea why?

Here is the remainder of the script: 

// Remove existing auths assigned to the user
var existingAuthsGr = new GlideRecord('auth table');
 existingAuthsGr.addQuery('u_user', userGr.sys_id);
 existingAuthsGr.deleteMultiple();

// Assign the unique roles to the user
for (var i = 0; i < finAuths.length; i++) {
var newAuth = new GlideRecord('auth table');
 newAuth.initialize();
 newAuth.u_user = userGr.sys_id;
 newAuth.u_user_authorization = finAuths[i];
 newAuth.insert();
   }

}