To use VivifyScrum integration in n8n, start by adding the HTTP Request node to your workflow canvas and authenticate it using a generic authentication method. Once connected, you can make custom API calls to VivifyScrum to query the data you need using the URLs you provide, for example: after authenticating the HTTP Request node, you can easily create new records in VivifyScrum by sending POST requests with the necessary JSON payload. To update existing records, you'll need to use PUT requests with the appropriate identifiers in the URL. For retrieving data, use GET requests with URLs that align with the endpoints for fetching specific project details, tasks, or user data.