code: function (command, parameters, callback) {
        if (typeof parameters === 'function') {
          callback = parameters;
          parameters = {};
        }
  
        parameters || (parameters = {});
        parameters.command = command;
        
        const options = {
          method: 'GET',
          url: PUBLIC_API_URL,
          qs: parameters
        };
  
        options.qs.command = command;
  
        return this._request(options, callback);
      }
docs: Make a public API request