feat: adds command to delete api keys

We currently do not have a way to clean up api keys. There may be cases
where users of headscale may generate a lot of api keys and these may
end up accumulating in the database. This commit adds the command to
delete an api key given a prefix.

cmd/headscale/cli/api_key.go

@@ -5,13 +5,14 @@ import (
 	"strconv"
 	"time"
 
-	v1 "github.com/juanfont/headscale/gen/go/headscale/v1"
-	"github.com/juanfont/headscale/hscontrol/util"
 	"github.com/prometheus/common/model"
 	"github.com/pterm/pterm"
 	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
 	"google.golang.org/protobuf/types/known/timestamppb"
+
+	v1 "github.com/juanfont/headscale/gen/go/headscale/v1"
+	"github.com/juanfont/headscale/hscontrol/util"
 )
 
 const (
@@ -29,11 +30,16 @@ func init() {
 	apiKeysCmd.AddCommand(createAPIKeyCmd)
 
 	expireAPIKeyCmd.Flags().StringP("prefix", "p", "", "ApiKey prefix")
-	err := expireAPIKeyCmd.MarkFlagRequired("prefix")
-	if err != nil {
+	if err := expireAPIKeyCmd.MarkFlagRequired("prefix"); err != nil {
 		log.Fatal().Err(err).Msg("")
 	}
 	apiKeysCmd.AddCommand(expireAPIKeyCmd)
+
+	deleteAPIKeyCmd.Flags().StringP("prefix", "p", "", "ApiKey prefix")
+	if err := deleteAPIKeyCmd.MarkFlagRequired("prefix"); err != nil {
+		log.Fatal().Err(err).Msg("")
+	}
+	apiKeysCmd.AddCommand(deleteAPIKeyCmd)
 }
 
 var apiKeysCmd = &cobra.Command{
@@ -199,3 +205,44 @@ var expireAPIKeyCmd = &cobra.Command{
 		SuccessOutput(response, "Key expired", output)
 	},
 }
+
+var deleteAPIKeyCmd = &cobra.Command{
+	Use:     "delete",
+	Short:   "Delete an ApiKey",
+	Aliases: []string{"delete", "del"},
+	Run: func(cmd *cobra.Command, args []string) {
+		output, _ := cmd.Flags().GetString("output")
+
+		prefix, err := cmd.Flags().GetString("prefix")
+		if err != nil {
+			ErrorOutput(
+				err,
+				fmt.Sprintf("Error getting prefix from CLI flag: %s", err),
+				output,
+			)
+
+			return
+		}
+
+		ctx, client, conn, cancel := getHeadscaleCLIClient()
+		defer cancel()
+		defer conn.Close()
+
+		request := &v1.DeleteApiKeyRequest{
+			Prefix: prefix,
+		}
+
+		response, err := client.DeleteApiKey(ctx, request)
+		if err != nil {
+			ErrorOutput(
+				err,
+				fmt.Sprintf("Cannot delete Api Key: %s\n", err),
+				output,
+			)
+
+			return
+		}
+
+		SuccessOutput(response, "Key deleted", output)
+	},
+}