code: function (connectionInfo, query, params) {
      var connection,
          client = new pg.Client(connectionInfo);
  
      client.connect(function (err) {
          if (err) {
              return respond({
                  success: false,
                  data: {
                      err: err,
                      query: query,
                      connection: connectionInfo
                  }
              });
          }
  
          // execute a query on our database
          client.query(query, params, function (err, result) {
              // close the client
              client.end();
  
              // treat the error
              if (err) {
                  return respond({
                      success: false,
                      data: {
                          err: err,
                          query: query,
                          connection: connectionInfo
                      }
                  });
              }
              
              // Return the respose
              return respond({
                  success: true,
                  data: result
              });
          });
      });
  }
docs: Execute postresql query
  @param   {object} connectionInfo Object containing information about the connection
  @param   {string} query          The query to execute
  @param   {Array}  params         Params to use in the query
  @returns {mixed}  Void