All the APIs under UPI credit use HTTP Basic Auth for authentication. The username for basic auth is the
partnerId that is available form the dashboard. The password is the
serverApiKey from the dashboard.
You can use
testUpiPartner as your partnerId [username] and
zCrGcZjsGLnKgNdSWpUjUvHmRTShFpUr as your Server API Key [password] for
Never share your API Keys with anyone. Anyone with the API Key will be able to create transactions on your behalf. It should reside solely on your servers.