Xaman OAuth

Looking to connect Xaman’s API to Bubble.io using Bubble’s native API connector! Developing a front end connection to Xaman from my web app that allows users to sign in using their personal ledger accounts.

For API OAuth authentication , would it be “password flow”, “user-agent flow”, or “custom token”??

for the API call I have the OAuth endpoint: https://oauth2.xumm.app/auth

Relatively easy question I believe. Thank you all for your help!