# December Updates Check out what we've been doing at Terra over the month of December! ### New Features * Implemented widget sessions to allow your developer ID and API Key to be hidden from the user during authentication. * Implemented custom authentication success and failure redirects when authenticating using the widget to improve flow for users. * Implemented passing of a `reference_id` field which will be sent to your webhook URL upon user authentication to allow easier linking of payloads with users of your service. * Added HMAC signature verification to allow ensuring that webhook payloads came from Terra. * Added `GET /menstruation` endpoint - currently this data is only provided by Garmin. ### Bugfixes * Fixed issue where authenticating with Polar would sometimes not allow access to user data. * Fixed some fields not being present in payloads for certain providers. * Fixed the user deregistration only soft-deregistering users from the service - users tokens are now revoked to ensure Terra no longer has access to the data. * Fixed issue where timezone data for some providers would show as UTC in the timestamp, but the data was not actually in UTC time * New WearOS SDK available which allows streaming of activity data to Terra using the watch's WiFi connection. A bluetooth low energy SDK is under development. * New Apple SDK to allow retrieval of data from HealthKit which supports streaming of data to Terra using the phone's WiFi connection. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.tryterra.co/changelog/general-updates/december-updates.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.