Pretty prints a json list of users from a Datadog Account.
Useful for large orgs with 100s or 1000s or users
"-k", "--apikey", help="Your Datadog API key"
"-a", "--appkey", help="Your Datadog app key"
"-o", "--adminonly", help="Only print admins"
"-s", "--standardonly", help="Only print standard users"
"-e", "--enabledonly", help="Only print enabled accounts"
"-v", "--verifiedonly", help="Only print verified (non-pending) accounts"