code: function _create(model, payload, Log) {
    let request = { payload: payload }
    return _createHandler(model, request, Log)
  }
docs: Create function exposed as a mongoose wrapper.
  @param model: A mongoose model.
  @param payload: Data used to create the model document/s.
  @param Log: A logging object.
  @returns {object} A promise for the resulting model document/s.
  @private