refactor: Reorganize into user and group commands

cmd/group/create.go

+package group
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/spf13/cobra"
+)
+
+var CreateCmd = &cobra.Command{
+	Use:   "create",
+	Short: "Create new group",
+	RunE:  createGroupFunc,
+}
+
+func init() {
+	CreateCmd.Flags().StringP("groupname", "e", "", "Group name (use quotes for spaces)")
+	CreateCmd.Flags().BoolP("confirm", "y", false, "Skip confirmation prompt")
+
+	CreateCmd.MarkFlagRequired("groupname")
+}
+
+func createGroupFunc(cmd *cobra.Command, args []string) error {
+	groupName, err := cmd.Flags().GetString("groupname")
+	if err != nil {
+		return err
+	}
+	confirm, err := cmd.Flags().GetBool("confirm")
+	if err != nil {
+		return err
+	}
+	fmt.Printf("Groupname: %s\n", groupName)
+
+	if !confirm {
+		fmt.Print("Proceed with group creation? [y/N] ")
+		reader := bufio.NewReader(os.Stdin)
+		response, _ := reader.ReadString('\n')
+		if strings.TrimSpace(strings.ToLower(response)) != "y" {
+			fmt.Println("Aborted.")
+			os.Exit(1)
+		}
+	}
+
+	fmt.Println("Done!")
+	return nil
+}