How to reference the key from json with node.js

Question

How would I access the following json data

"users":{
    "2211392761":{"username":"user1"},
    "14300995184":{"username":"user2"},
    "2781554712":{"username":"user3"},
    "3554341":{"username":"user4"},
    "202611":{"username":"user5"},
    "17754300653761":{"username":"user6"}
}

I have this so far and I am aware it is completely wrong:

Object.keys(jsonevents["events"]).forEach(function(key) {
    if(eventName == jsonevents["events"][key]["name"]){
        if(jsonevents["events"][key]["users"]){
            if(jsonevents['events'][key]["users"][message.author.id]){
                delete jsonevents['events'][key]["users"][message.author.id];
                fs.writeFile(eventsjson, JSON.stringify(jsonevents),'utf8');
                sayMessage += "```User is no longer part of the event "+jsonevents['events'][key]["name"]+"```";
            } else {
                sayMessage += "```user is not in the event "+jsonevents['events'][key]["name"]+"```";
            }
        } else {
            sayMessage += "```Why do we have no users```";
        }
    } else {
        //sayMessage += "```No event found```";
    }
});

I need to be able to access the key by passing in the username, so user2 would give me 14300995184 so i can then use this to remove the user from the event.

Answer 1

You can search through the Object.entries with find() and return the right object. It will return an array of key/value the key will be what you're after:

let users = {
    "2211392761":{"username":"user1"},
    "14300995184":{"username":"user2"},
    "2781554712":{"username":"user3"},
    "3554341":{"username":"user4"},
    "202611":{"username":"user5"},
    "17754300653761":{"username":"user6"}
}

let found = Object.entries(users).find(([key, value]) => value.username === "user2")
console.log(found && found[0]) // found is undefined if not found