e>productpage</code> service
adds a custom <code>end-user</code> header to all outbound HTTP requests to the reviews
service.</p><p>Istio also supports routing based on strongly authenticated JWT on ingress gateway, refer to the
<a href=/v1.16/docs/tasks/security/authentication/jwt-route>JWT claim based routing</a> for more details.</p><p>Remember, <code>reviews:v2</code> is the version that includes the star ratings feature.</p><ol><li>Run the following command to enable user-based routing:</li></ol><div i