title: Not able to see the log in interceptor
body: <p>I tried to implement interceptors but it is not working. My project has various lazy loading modules but I have implemented in <code>app.module.ts</code> only. Also I checked <code>HttpClientModule</code>. It is imported in the <code>app.module.ts</code> only, not in other places.</p>
  
  <p>Interceptor:</p>
  
  <pre><code>@Injectable()
  export class AuthInterceptorTest implements HttpInterceptor {
      constructor() { }
  
      intercept(req: HttpRequest&lt;any&gt;, 
               next: HttpHandler): Observable&lt;HttpEvent&lt;any&gt;&gt; {
                  console.log("Intercepting...");
                  return next.handle(req);
      } 
  
  }
  `
  </code></pre>
  
  <p>Implementation in app<code>.module.ts</code></p>
  
  <pre><code>providers: [{provide:HTTP_INTERCEPTORS, useClass:AuthInterceptorTest, multi:true}]
  </code></pre>
  
  <p>Is there anything missed in the implementation or code?</p>