Disable or redirect logging of successful logins

Scenario:
I have some scripts that use the API to login and collect stats from the tik to feed my monitoring box (zabbix).

Problem:
I now have a log page full of successful logins in my logs which is hiding any “real” / interesting events that may be happening.

I hav not been able to find anything that removes this from my logs without pretty much redirecting all my authentication logs.

  1. Is there any way to just disable successful logins from the log on the tik itself? I don’t mind them continuing to go to syslog server or anywhere else (I don’t mind if they are disabled entirely). I need failed logins to keep coming in as I use it for dealing with people trying to brute-force my way in.
  2. If #1 is not possible, can the API logins be logged separately? or at least with a separate logging category?