package main import ( "fmt" "github.com/gophercloud/gophercloud" "github.com/gophercloud/gophercloud/openstack" ) func main() { // Set up the authentication credentials authOpts, err := openstack.AuthOptionsFromEnv() if err != nil { fmt.Println("Error:", err) return } // Create a new client provider, err := openstack.AuthenticatedClient(authOpts) if err != nil { fmt.Println("Error:", err) return } serviceClient, err := openstack.NewComputeV2(provider, gophercloud.EndpointOpts{ Region: "RegionOne", }) if err != nil { fmt.Println("Error:", err) return } // Use the ServiceClient to retrieve information about an instance instance, err := servers.Get(serviceClient, "instance-id").Extract() if err != nil { fmt.Println("Error:", err) return } fmt.Println("Instance ID:", instance.ID) fmt.Println("Instance Name:", instance.Name) fmt.Println("Instance Status:", instance.Status) }In the code above, we first set up the authentication credentials using the "AuthOptionsFromEnv" function. Next, we create a new client using these credentials and specify the endpoint region for the desired cloud service. Finally, we use the ServiceClient's "Get" function to retrieve information about a specific instance. Overall, the gophercloud.gophercloud ServiceClient module provides a convenient way to interact with various cloud services in Go.