How do I make it so mongoose returns the value of only one key from every document in a collection?

Let’s say everytime you say “!check” in a discord channel, a bot stores the following in a mongoose database called “check”:

const check_c = new check({
        _id: mongoose.Types.ObjectId(),
        checkedAt: message.createdAt;
        checkArgs: args.join(' ');

Let’s say I want it so when you say “!return checkedBy” it sends every single value from the “checkedBy” key from every document.

How do I do that? It’s actually possible? Maybe using a loop?

^ Sorry for my terrible english. I hope you can understand me.