Add IBM Cloud billing command #48
Description
We currently have billing commands for AWS, Digital Ocean and Datadog. This feature request is to add a command for the IBM Cloud.
Potentially useful references: https://stackoverflow.com/questions/52333121/ibm-cloud-how-to-access-the-api-for-billing-and-usage and https://github.com/IBM-Cloud/openwhisk-cloud-usage-sample.