Build and type fixes

apps/leafcutter/pages/api/visualizations/create.ts

@@ -18,14 +18,14 @@ const handler = async (req: NextApiRequest, res: NextApiResponse) => {
 
     const { visualizationID, title, description, query } = req.body;
     const id = await createUserVisualization({
-        email: session.email,
+        email: session.email as string,
         visualizationID,
         title,
         description,
         query
     });
 
-    return res.json({ id })
+    return res.json({ id });
 };
 
 export default handler;