It seems that your Elasticsearch connection is working well. However, even if you add a cron job to crontab, the crontab service might not work due to Linux issues. If you do not see users in the list, you can try two things:
1. Update the date_indexed field in the users table to NULL. The scheduler/cron should reindex the records. If the records are in Elasticsearch, they should be displayed in the list.
2. Edit the api/constants/legacy_views.php file and set list to true for the Users module. After refreshing the page, this change will make the system display the user list without using Elasticsearch.
