<role rolename="demo"/>
<user username="demo" password="[pass]" roles="demo"/>

<security-constraint>
    <web-resource-collection>
        <web-resource-name>Demo user</web-resource-name>
        <url-pattern>/*</url-pattern>
    </web-resource-collection>
    <auth-constraint>
        <role-name>demo</role-name>
    </auth-constraint>
</security-constraint>
<login-config>
    <auth-method>basic</auth-method>
</login-config>