import ( "fmt" "github.com/rackspace/gophercloud" "github.com/rackspace/gophercloud/openstack" "github.com/rackspace/gophercloud/openstack/compute/v2" ) func main() { // Set up authentication credentials opts, _ := openstack.AuthOptionsFromEnv() provider, _ := openstack.AuthenticatedClient(opts) // Create a new ServiceClient for the Compute service endpointOpts := gophercloud.EndpointOpts{ Region: "us-west-1" } computeClient, _ := openstack.NewComputeV2(provider, endpointOpts) // List all flavors flavors, _ := v2.ListFlavors(computeClient, nil).AllPages() for _, flavor := range flavors { fmt.Println(flavor.Name) } }In this example, we first set up authentication credentials using environment variables. We then use the `openstack.AuthenticatedClient` function to create a new `ProviderClient`, which contains the authentication credentials and other configuration options. We use this `ProviderClient` to create a new `ServiceClient` object representing the Compute service. We then use the `v2` package from the `compute` subpackage to interact with the Compute service, specifically calling the `ListFlavors` function to retrieve a list of all available virtual machine flavors. Finally, we use a loop to print out the name of each flavor. Overall, the `ServiceClient` type provides a powerful and flexible way to interact with OpenStack services in Go, making it easier to build robust and scalable cloud applications.