How to get the user's current node after sign in and before a payment is made?

[mpint]

Hello, we want to make sure our users are pointing to the correct custom node before making a payment in order to minimize failed payment errors in Xumm from node mismatches (e.g. account not yet funded or no trustline, etc).

For example, a user could sign in before switching nodes, then run into payment errors due to being on the wrong node. We need a clear way to detect the node mismatch before they make a payment in order to warn them of the issue.

Is there a way to get the users current node after they've signed in?