collectd is failling to collect the info for libvirt

Issue

• collectd is failing to collect virt details:

# systemctl status -l collectd
● collectd.service - Collectd statistics daemon
   Loaded: loaded (/usr/lib/systemd/system/collectd.service; enabled; vendor preset: disabled)
   Active: active (running) since Wed 2019-01-09 15:28:17 CET; 19min ago
     Docs: man:collectd(1)
           man:collectd.conf(5)
 Main PID: 4369 (collectd)
    Tasks: 11
   Memory: 3.5M
   CGroup: /system.slice/collectd.service
           └─4369 /usr/sbin/collectd

 <hostname> collectd[4369]: plugin_load: plugin "syslog" successfully loaded.
 <hostname> collectd[4369]: Systemd detected, trying to signal readyness.
 <hostname> systemd[1]: Started Collectd statistics daemon.
 <hostname> collectd[4369]: No worthy mechs found
 <hostname> collectd[4369]: virt plugin: Unable to connect: virConnectOpen failed.
 <hostname> collectd[4369]: libvirt: XML-RPC error : authentication failed: Failed to start SASL negotiation: -4 (SASL(-4): no mechanism available: No worthy mechs found)
 <hostname> collectd[4369]: Initialization of plugin `virt' failed with status -1. Plugin will be unloaded.
 <hostname> collectd[4369]: plugin_unregister_read: No such read function: virt
 <hostname> collectd[4369]: Error: one or more plugin init callbacks failed.
 <hostname> collectd[4369]: Initialization complete, entering read-loop.