interaction.options.getMember() not definable?

import { Command } from "@sapphire/framework";

export class RenameCommand extends Command {
  public constructor(context: Command.LoaderContext, options: Command.Options) {
    super(context, {
      ...options,
    });
  }
  public override registerApplicationCommands(registry: Command.Registry) {
    registry.registerChatInputCommand((builder) =>
      builder
        .setName("setnickname")
        .setDescription("Let the bot rename someone")
        .addUserOption(option =>
          option.setName('member')
          .setDescription('For what member is it?')
          .setRequired(true)
        )
        .addStringOption(option =>
          option.setName('name')
          .setDescription('What will their new name be?')
          .setRequired(true)
        );
    );
  }

  public async chatInputRun(interaction: Command.ChatInputCommandInteraction) {
    const Member = interaction.options.getMember('member')
    const NewName = interaction.options.getString('name')

    await interaction.reply({ content: `Done!`, ephemeral: true})
  }
};