Add POST example for etcd replicators in federation API doc (#2055)
Add POST example for etcd replicators in federation API doc (#2055)

* Add auth providers API examples

* Add example to Events API doc

* Add POST example for etcd replicators in federation API doc

* Update authproviders.md

* Update events.md

sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs,sensu/sensu-docs