TypeError: Cannot read property 'find' of undefined
   at router.get (/var/task/routes/index.js:50:29)
   at Layer.handle [as handle_request] (/var/task/node_modules/express/lib/router/layer.js:95:5)
   at next (/var/task/node_modules/express/lib/router/route.js:137:13)
   at Route.dispatch (/var/task/node_modules/express/lib/router/route.js:112:3)
   at Layer.handle [as handle_request] (/var/task/node_modules/express/lib/router/layer.js:95:5)
   at /var/task/node_modules/express/lib/router/index.js:281:22
   at param (/var/task/node_modules/express/lib/router/index.js:354:14)
   at param (/var/task/node_modules/express/lib/router/index.js:365:14)
   at param (/var/task/node_modules/express/lib/router/index.js:365:14)
   at Function.process_params (/var/task/node_modules/express/lib/router/index.js:410:3)