fix suggested by easwars

Author: lychung83

cmd/cloud_sql_proxy/cloud_sql_proxy.go

@@ -340,7 +340,6 @@ func listInstances(ctx context.Context, cl *http.Client, projects []string) ([]s
 }
 
 func gcloudProject() []string {
-	const gcloudResultErrStr = "gcloud failed to get project list. See log for detail."
 	buf := new(bytes.Buffer)
 	cmd := exec.Command("gcloud", "--format", "json", "config", "list", "core/project")
 	cmd.Stdout = buf

cmd/cloud_sql_proxy/proxy.go

@@ -343,9 +343,9 @@ func CreateInstanceConfigs(dir string, useFuse bool, instances []string, instanc
 		// 2. failed to invoke gcloud
 		var flags string
 		if fuse.Supported() {
-			flags = "-projects, -fuse, or -instances"
+			flags = "-projects, -fuse, -instances or -instances_metadata"
 		} else {
-			flags = "-projects or -instances"
+			flags = "-projects, -instances or -instances_metadata"
 		}
 
 		errStr := fmt.Sprintf("no instance selected because none of %s is specified", flags)