Developer Questions

I have followed the XummPkce tutorial here https://github.com/XRPL-Labs/XummPkce/blob/main/sample/jsmodule.html . When you call the XUMM state after being signed in, you can access a JWT token. Decoded on jwt.io , it contains information about the signed payload, the user's wallet, payload etc. What is the intended usage of this? I want to decode it & authenticate this information, so if possible, how can I go about that?