Improve share error handling

functions/cleanShares/src/index.js

@@ -4,7 +4,6 @@ module.exports = async function (req, res) {
   const client = new sdk.Client();
 
   let database = new sdk.Database(client);
-
   let storage = new sdk.Storage(client);
 
   client

functions/createShare/src/index.js

@@ -35,7 +35,7 @@ module.exports = async function (req, res) {
   }
 
   let userIds;
-  if (payload.emails) {
+  if (payload.emails.length > 0) {
     const creatorEmail = (await users.get(userId)).email
     userIds = []
     userIds.push(userId)