You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: pubkey.go
    path of file: ./repos/soft-serve/pkg/ssh/cmd
    
    the code of the file until where you have to start completion: package cmd

import (
	"strings"

	"github.com/charmbracelet/soft-serve/pkg/backend"
	"github.com/charmbracelet/soft-serve/pkg/sshutils"
	"github.com/spf13/cobra"
)

// PubkeyCommand returns a command that manages user public keys.
func PubkeyCommand() *cobra.Command {
	cmd := &cobra.Command{
		Use:     "pubkey",
		Aliases: []string{"pubkeys", "publickey", "publickeys"},
		Short:   "Manage your public keys",
	}

	pubkeyAddCommand := &cobra.Command{
		Use:   "add AUTHORIZED_KEY",
		Short: "Add a public key",
		Args:  cobra.MinimumNArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			ctx := cmd.Context()
			be := backend.FromContext(ctx)
			pk 
    
func PubkeyCommand() *cobra.Command {
	cmd := &cobra.Command{
		Use:     "pubkey",
		Aliases: []string{"pubkeys", "publickey", "publickeys"},
		Short:   "Manage your public keys",
	}

	pubkeyAddCommand := &cobra.Command{
		Use:   "add AUTHORIZED_KEY",
		Short: "Add a public key",
		Args:  cobra.MinimumNArgs(1),
		RunE: func(cmd *cobra.Command, args []string) error {
			ctx := cmd.Context()
			be := backend.FromContext(ctx)
			pk := sshutils.PublicKeyFromContext(ctx)
			user, err := be.UserByPublicKey(ctx, pk)
			if err != nil {
				return err
			}

			apk, _, err := sshutils.ParseAuthorizedKey(strings.Join(args, " "))
			if err != nil {
				return err
			}

			return be.AddPublicKey(ctx, user.Username(), apk)
		},
	}

	pubkeyRemoveCommand := &cobra.Command{
		Use:   "remove AUTHORIZED_KEY",
		Args:  cobra.MinimumNArgs(1),
		Short: "Remove a public key",
		RunE: func(cmd *cobra.Command, args []string) error {
			ctx := cmd.Context()
			be := backend.FromContext(ctx)
			pk := sshutils.PublicKeyFromContext(ctx)
			user, err := be.UserByPublicKey(ctx, pk)
			if err != nil {
				return err
			}

			apk, _, err := sshutils.ParseAuthorizedKey(strings.Join(args, " "))
			if err != nil {
				return err
			}

			return be.RemovePublicKey(ctx, user.Username(), apk)
		},
	}

	pubkeyListCommand := &cobra.Command{
		Use:     "list",
		Aliases: []string{"ls"},
		Short:   "List public keys",
		Args:    cobra.NoArgs,
		RunE: func(cmd *cobra.Command, _ []string) error {
			ctx := cmd.Context()
			be := backend.FromContext(ctx)
			pk := sshutils.PublicKeyFromContext(ctx)
			user, err := be.UserByPublicKey(ctx, pk)
			if err != nil {
				return err
			}

			pks := user.PublicKeys()
			for _, pk := range pks {
				cmd.Println(sshutils.MarshalAuthorizedKey(pk))
			}

			return nil
		},
	}

	cmd.AddCommand(
		pubkeyAddCommand,
		pubkeyRemoveCommand,
		pubkeyListCommand,
	)

	return cmd
}