Add subscription details to user for better-auth #199
Description
It'd be a really nice integration with Better-Auth, if we added a column for each user to store their current subscription status.
To give more context, in my website, I wanted to check the subscription status of the current signed in user, but not have to hit the Polar API for each request (why hit the Polar API when I already have access to my own DB).
So, what I did was add an additionalField to each of my users, and use the webhook events to change the subscription status of the user whenever the subscription changed:
This seems like it will work pretty well and reduce dependence on hitting the polar API for each one of my requests.
So, for the better-auth polar adapter, I think it would be great to add a new column for users which is a JSON.stringify'd version of the current subscription details. Then it would make it easy to access the current subscription state, rather than hitting the Polar API for it.