d</code> service. If you have enabled
<a href=/v1.15/docs/concepts/security/#mutual-tls-authentication>mutual TLS authentication</a> for your mesh, you can use a
service account to identify your <code>bookstore-frontend</code> service. Granting the <code>book-reader</code> role to the <code>bookstore-frontend</code>
service can be done by creating a <code>ServiceRoleBinding</code> as shown below:</p><pre><code class=language-yaml data-expandlinks=true data-repo=istio>apiVersion: &#34;rbac.istio.io/v1alpha1&