text: define(["js/data/Model"], function (Model) {
  
      return Model.inherit('js.data.Authentication', {
  
          schema: {
              username: String,
              password: String,
              data: {
                  type: Object,
                  required: false
              },
              userId: {
                  type: Object,
                  required: false
              }
  
          },
  
          idField: "token"
  
      });
  
  });