Comment 1 for bug 1627094

Note that you can reduce the number events produced by Keystone using a configuration option. According to the Keystone documentation,

http://git.openstack.org/cgit/openstack/keystone/tree/etc/keystone.conf.sample?h=9.0.2#n105

[DEFAULT]
notification_opt_out=identity.authenticate.success

This would prevent keystone from sending notifications out on successful authentications.

Successful authentications and validations of user tokens are probably redundant: the creation alone does not mean anything, only the use on the remote system. One or the other should be removed.