How to setup service to pass google sheet IDs? AngularJS

Question

I am building a small widget using angular that takes Google sheet Ids given by user and publishes the output in nice json format. The problem is that my code does nothing.

Answer 1

Could be that there were 2 return statements in the service? Statement moved:

angular
    .module('adf.widget.charts')
    .service('chartService', chartService);

    function chartService(){
        return {
            getUrl: function(key) {
                var googleSheetkey = key;
                return googleSheetkey;
            }
        };  
    }