Moving api requests to another controller.

config/services.yaml

@@ -17,6 +17,7 @@ services:
         autoconfigure: true # Automatically registers your services as commands, event subscribers, etc.
 
 
+    Techtube\Bookinfo\BookFinder:
 
     # makes classes in src/ available to be used as services
     # this creates a service per class whose id is the fully-qualified class name