module.exports = (interaction, client) => {
    // if option 'user' is provided, check if that user is boosting the guild. Otherwise, check if the user who ran the command is boosting the guild.
    const user = interaction.options.getUser('user') || interaction.user;
    const member = interaction.guild.members.cache.get(user.id);
    if (!member) {
        interaction.reply({ content: `Could not find member with ID ${user.id}.`, ephemeral: true });
        return;
    }
    if (member.premiumSince) {
        interaction.reply({ content: `${user.tag} is boosting the guild!`, ephemeral: true });
    } else {
        interaction.reply({ content: `${user.tag} is not boosting the guild.`, ephemeral: true });
    }
}