Use third party library in a angular factory

This is my factory:

.factory('DataService',['$http',function($http, Backand ){
    var data = [];
    return {
        GetData: function(){
            return $http.get(Backand.getApiUrl() + '/1/objects/details').then(function(response){
                data = response;
                return response;
            });
        },
        GetElem: function(personId){
            for(i=0;i<data.length;i++){
                if(data[i].id == personId){
                    return data[i];
                }
            }
        }
    }

}]);

Now the problem. The third party library Backandis correctly injected but i get the error: Cannot read property 'getApiUrl' of undefined

So Backand is undefined. When i use Backand in a controller everything work just fine.

What should i do to fix this?

You are missing Backand while injecting

Change this:

.factory('DataService',['$http',function($http, Backand ){

To This:

.factory('DataService',['$http', 'Backand',function($http, Backand ){

Hope this will work for you.