HELP Login with 2 types of users: Admin and User - FB4.6

Hello forum

i need some help from experts here.

im creating a small project where i want to have 3 kind of users to login and based on there role go to their page.

I have a Admin role, Sales Rep role and Retailer role.

I have a Main.mxml that has a viewstack on it loading each module.

I have 4 Modules: Login.mxml, Admin.mxml, Sales.mxml and Retailer.mxml.

<?xml version="1.0" encoding="utf-8"?>

<data>

    <user>

        <userID>01</userID>

        <userName>admin</userName>

        <email>xxx</email>

        <password>123456</password>

        <role>Admin</role>

    </user>

    <user>

        <userID>02</userID>

        <userName>user</userName>

        <email>xxx</email>

        <password>123456</password>

        <role>Sales</role>

    </user>

    <user>

        <userID>03</userID>

        <userName>retailer</userName>

        <email>xxx</email>

        <password>123456</password>

        <role>Retailer</role>

    </user>

</data>

I want to be able to when one of this 3 login it send them to their module.

What is the best way to do this

Any help please