add network users subcommand

cli/functions/usergroups.go

@@ -6,14 +6,17 @@ import (
 	"github.com/gravitl/netmaker/models/promodels"
 )
 
+// GetUsergroups - fetch all usergroups
 func GetUsergroups() *promodels.UserGroups {
 	return request[promodels.UserGroups](http.MethodGet, "/api/usergroups", nil)
 }
 
+// CreateUsergroup - create a usergroup
 func CreateUsergroup(usergroupName string) {
 	request[any](http.MethodPost, "/api/usergroups/"+usergroupName, nil)
 }
 
+// DeleteUsergroup - delete a usergroup
 func DeleteUsergroup(usergroupName string) {
 	request[any](http.MethodDelete, "/api/usergroups/"+usergroupName, nil)
 }