This command registers the application commands with Discord and should be run after updating.
If your bot is set to update automatically, you can set the PUBLISH_COMMANDS
environment variable to do this automatically at startup.
This is a potentially dangerous command that can be used for troubleshooting, getting data, sending custom messages, etc.
Everything after the command name is expected to be valid JavaScript and the return value is logged to console.
You can access the (extended) discord.js client through this.client.
If the in-memory cache becomes out of sync with the database, this command will re-run part of the startup sequence to refresh the cache.
This is helpful if the database is modified externally and you don't want to cause downtime by restarting the bot.