Forcing user synchronisation and tracing LDAP issues

I’m a new user of this great project.

I setup my external LDAP authentication parameters. I would like to force a synchronisation without waiting for the next scheduled run. Is there a way to trigger the cron job. I already tried adding a cron section in my app.ini with the RUN_AT_START = true.

I also change my log level to trace to get more information. But nothing relates to LDAP sync.

Would need a bit of guidance on setting this up.