Troubleshooting Azure snapshot plugin issue

I have a 3 node Elasticsearch 1.7.1 cluster running on Azure VMs

I installed the azure plugin using the following:

sudo /usr/share/elasticsearch/bin/plugin install elasticsearch/elasticsearch-cloud-azure/2.8.1

elasticsearch.yml change:

cloud:
azure:
storage:
account: datastorageaccount
key: long_primary_access_key==

    management:
         subscription.id: dddd-some-subscription-id
         cloud.service.name: elastservicename

I stopped and started each node one at a time, then used Sense to try to create a snapshot:

PUT _snapshot/es_snapshot_2015-09-16_b
{
"type": "azure"
}

returns the following:

{
"acknowledged": true
}

but then nothing happens and there are no log entires in the elasticsearch log

get _snapshot returns:

{
"es_snapshot_2015-09-16": {
"type": "azure",
"settings": {}
},
"es_snapshot_2015-09-16_b": {
"type": "azure",
"settings": {}
}
}

get _snapshot/_status returns:

{
"snapshots": []
}

How can I go about troubleshooting this? Is there any place where I can get more information about what is happening?

You created a repository, not a Snapshot.
You need then to Snapshot your indices.

Ah, thank you very much.