title: .addArgument is not a function Discord bot
body: <p>Here is my Discord command module code, for some reason this is spitting out that .addArgument is not a function.</p>
  <pre><code>const Discord = require('discord.js');
  const { SlashCommandBuilder } = require('@discordjs/builders');
  
  data = new SlashCommandBuilder()
      .setName('purge')
      .setDescription('Purges a number of messages from the channel.')
      .addArgument('number', 'The number of messages to purge.')
      .addArgument('channel', 'The channel to purge messages from.')
      .setExecute(async (interaction, args) =&gt; {
          const channel = interaction.guild.channels.cache.find(c =&gt; c.name === args.channel);
          if (!channel) return interaction.reply('Channel not found.');
          const messages = await channel.messages.fetch({ limit: args.number });
          await channel.bulkDelete(messages);
          interaction.reply(`Purged ${messages.size} messages.`);
      }
  
  );
  </code></pre>
  <p>It just gives me this:</p>
  <blockquote>
  <p>TypeError: (intermediate value).setName(...).setDescription(...).addArgument is not a function</p>
  </blockquote>