Previously I've been told that to integrate as first party, I need an API to give access token to the front end and pass that API URL as refresh url in sdk Credentials. But it is giving me error and I'm not able to proceed further. Also I got to know that we can pass refresh URL as null and add a listener to SDK for Token management. Which is the better way. We have production date in a week, so we need the help asap. Thanks in advance.
Disclaimer: This is not the account that's going to be used for integration. We will use client's account which is a US account.
