fix pager issue

src/commands/page.ts

@@ -52,6 +52,7 @@ export default class Page extends Command {
       message.delete();
       const loading = await this.loading(message.channel, 'Paging...');
       const sender = await this.client.db.PagerNumber.findOne({ individualAssignID: message.author.id });
+      if (!sender) return this.error(message.channel, 'You do not have a Pager Numer.');
       const page = await this.page(args[0], sender.num, args[1], message, args[2] ? args.slice(2).join(' ') : undefined);
       if (page.status === true) {
         loading.delete();