How to find all the Users having access to my application

Hi,

I create a security constraint for my Java application using the following code in web.xml :

<security-constraint>

       <web-resource-collection>

            <web-resource-name>Protected Area</web-resource-name>

            <url-pattern>/*</url-pattern>

       </web-resource-collection>

       <auth-constraint>

            <role-name>AppUsers</role-name>

       </auth-constraint>

</security-constraint>

<security-role>

     <description>Users having app access</description>

     <role-name>AppUsers</role-name>

</security-role>

Now from cockpit, I assign this role to 3 users. Is there any API to find the list of users having access to my application programmatically?

I checked the documentation to find out the user profile attributes in here

But couldn't find any API for my use-case.