Subcommand isn't running

@ApplyOptions<Subcommand.Options>({
  name: 'blacklist',
  description: 'Blacklist users or guilds from using the bot.',
  preconditions: ['OwnerOnly'],
  subcommands: [
    {
      name: 'user',
      chatInputRun: 'chatInputUser'
    }
  ]
})
export class BlacklistCommand extends Subcommand {
  public override registerApplicationCommands(
    registry: ChatInputCommand.Registry
  ) {
    registry.registerChatInputCommand(
      (builder) =>
        builder
          .setName(this.name)
          .setDescription(this.description)
          .addSubcommand((command) =>
            command
              .setName('user')
              .setDescription('Blacklist a user from using the bot.')
              .addUserOption((option) =>
                option
                  .setName('user')
                  .setDescription('The user to blacklist.')
                  .setRequired(true)
              )
          ),
      {
        guildIds: config.testGuilds
      }
    );
  }

  public async chatInputUser(
    interaction: Subcommand.ChatInputCommandInteraction
  ) {