code: function appRequest(params, cb) {
    params = params || {};
    var mbaasConf = params[constants.MBAAS_CONF_KEY];
    params[constants.MBAAS_CONF_KEY] = undefined;
    //Adding Mbaas Config Params
    var fullParams = _.extend(_.clone(params), mbaasConf);
  
    var invalidParamError = validateAppParams(fullParams);
  
    if (invalidParamError) {
      return cb(invalidParamError);
    }
  
    fullParams = _buildAppRequestParams(fullParams);
  
    return doFHMbaaSRequest(fullParams, cb);
  }
docs: Performing A Request Against The App MBaaS API
  @param params
  @param cb