feat: make billing page functional

packages/lib/server-only/subscription/get-subscription-by-user-id.ts

@@ -0,0 +1,15 @@
+'use server';
+
+import { prisma } from '@documenso/prisma';
+
+export type GetSubscriptionByUserIdOptions = {
+  userId: number;
+};
+
+export const getSubscriptionByUserId = ({ userId }: GetSubscriptionByUserIdOptions) => {
+  return prisma.subscription.findFirst({
+    where: {
+      userId,
+    },
+  });
+};