feat/valid-session: check valid user/session from token instead of making a slow request to api

utils/session.ts

@@ -0,0 +1,18 @@
+import type { Session } from "next-auth"
+
+export function isValidSession(session: Session | null) {
+  if (!session) {
+    console.log("No session available (user not authenticated).")
+    return false
+  }
+  if (session.error) {
+    console.log(`Session error: ${session.error}`)
+    return false
+  }
+  if (session.token.expires_at && session.token?.expires_at < Date.now()) {
+    console.log(`Session expired: ${session.token?.expires_at}`)
+    return false
+  }
+
+  return true
+}