Sync volunteer hours and shift data using the VolunteerHub Open API

Steps

1. Have a VolunteerHub 'Superuser' account configured with a username and a password under 16 characters, since only Superusers get API access
2. Visit https://YOURORG.volunteerhub.com/openapi to view the interactive API resource page and build/test queries without writing code
3. Authenticate each request with HTTP Basic Auth over HTTPS, computing the Authorization header as base64(username:password) — non-SSL requests are rejected
4. GET endpoints under https://YOURORG.volunteerhub.com/api/v1/ (e.g. /events) to retrieve volunteer, event, or shift data for your organization's site
5. Set the Accept-Encoding: gzip, deflate header to reduce payload size for large data pulls, since responses are text-based and compress well
6. Request XML instead of the JSON default by sending an Accept: text/xml header if your consuming system needs XML