Throw error object and not a string

src/views/domains.js

@@ -217,7 +217,7 @@ angular.module('Application').controller('DomainsController', ['$scope', '$locat
                     };
 
                     if (!data.projectId || !data.credentials || !data.credentials.client_email || !data.credentials.private_key) {
-                        throw 'fields_missing';
+                        throw new Error('One or more fields are missing in the JSON');
                     }
                 } catch (e) {
                     $scope.domainConfigure.error = 'Cannot parse Google Service Account Key: ' + e.message;