I’m new in react and node js getting error when create new controller and model and route TypeError: Cannot read property ‘findAll’ of undefined    at exports.findAll (F:\elicit\hello_fullstack\renemattias-nodejs-master\app\controller\subscriber.controller.js:19:13)    at Layer.handle [as handle_request] (F:\elicit\hello_fullstack\renemattias-nodejs-master\node_modules\express\lib\router\layer.js:95:5)    at next (F:\elicit\hello_fullstack\renemattias-nodejs-master\node_modules\express\lib\router\route.js:137:13)    at ...