post
https://api-stg.transak.com/partners/api/v2/refresh-token
Refresh Access Token using api secret
The Refresh Access Token is an authenticated API that should be used when the access token is about to expire (not expired).
The access-token endpoint must only be invoked when the existing access token has expired, which occurs after 7 days. Please ensure this endpoint is not called repeatedly or on every request, as doing so is not required and may lead to unnecessary token regeneration or rate-limit issues.