What endpoint to query list of subscriptions on lemmy API

cross-posted from: https://lemmy.ml/post/1507151

I'm trying to build a minimal CLI that would sync subscriptions between 2 or more lemmy accounts.

To do so, the CLI would need to:

1. login to each account. For this I can use the login endpoint.
2. get a list of subscriptions from each account. <- This is where I'm currently stuck.
3. subscribe the accounts to the communities of other accounts. I think I can use the followCommunity endpoint.

My question is, how do I get a list of communities that a user follows?