getCronQueries (params) {
    return new Promise((resolve, reject) => {
      Vue.axios.get('api/crons', { params }).then((response) => {
        resolve(response.data);
      }).catch((error) => {
        reject(error);
      });
    });
  }
Gets a user's cron queries
@param {Object} params      Query params object to search for queries
@returns {Promise} Promise A promise object that signals the completion
                           or rejection of the request.