Help with slash commands

Hello, I'm trying to work on a project that involves doing some type of user lookup in a database.

My current code looks like this:

public override registerApplicationCommands(registry: Command.Registry) {
        registry.registerChatInputCommand((builder) =>
            builder
                .setName("find")
                .setDescription("Find a user on the server list.")
                .addStringOption((option) =>
                    option
                        .setName("user")
                        .setDescription("User to find.")
                        .setRequired(true),
                )
                .setDMPermission(false)
                .setDefaultMemberPermissions(PermissionFlagsBits.KickMembers),
        );
    }

public override registerApplicationCommands(registry: Command.Registry) {
        registry.registerChatInputCommand((builder) =>
            builder
                .setName("find")
                .setDescription("Find a user on the server list.")
                .addStringOption((option) =>
                    option
                        .setName("user")
                        .setDescription("User to find.")
                        .setRequired(true),
                )
                .setDMPermission(false)
                .setDefaultMemberPermissions(PermissionFlagsBits.KickMembers),
        );
    }

Ideally, I want the user to be able to provide either a user @mention, or a user ID, or even a username. What would be the best way to approach this?

Solution

instead of adding a string option, add a user option. You can see this in action with many of @Spinel 's commands for the