Gravity comes with a built-in logging tool that logs errors by default and allows you to record your own custom logs.
log.create(message, body, req, sendNotification, user, account);
You can pass 6 parameters to the log model:
description of log
json or error object
full error or response object
the model will extract the URL, HTTP method, user_id and account_id from the request.
true or false
Determines if an email should be sent to you as soon as an error occurs (default: false)
user ID to override the request object (or if not present in request)
account ID to override the request object