Returns a list of the names of your consumers that you have access to.
Sample endpoint: https://api.mediamath.com/opportunity-firehose/v2.0/consumers
GET
curl -i -X GET \
https://api.mediamath.com/opportunity-firehose/v2.0/consumersResponse
{ "example-consumer": null, "example-consumer-2": null, "example-consumer-3": null }