filter no email user

lib/providers/dingtalk.js

@@ -232,6 +232,12 @@ async function reloadFromDingtalkServer() {
       return u.active;
     }
     return false;
+  }).filter(u => {
+    if (!(u.orgEmail || u.email)) {
+      log.warn('Incorrect user missing email', u);
+      return false;
+    }
+    return true;
   }).map(u => {
     const mail = (u.orgEmail || u.email).toLowerCase();
     const dn = `mail=${mail},${u.firstDepartment.dn}`;