feat(#29): use magic link to sign in

src/routes/auth/callback/+server.ts

@@ -0,0 +1,14 @@
+import { redirect, type RequestHandler } from '@sveltejs/kit'
+
+export const GET: RequestHandler = async (event) => {
+  const { url, locals: { supabase } } = event;
+  const code = url.searchParams.get('code')
+
+  if (code) {
+    await supabase.auth.exchangeCodeForSession(code)
+  }
+
+  // TODO: Create stripe customer and sync with supabase user
+
+  throw redirect(303, '/account')
+}