JSFiddle - React, Tailwind, and code Playground

JavaScript

var list = {
    "user": {
        "success": true
    },
        "user1": {
        "success": false,
        "error": "User already exists"
    },
        "user2": {
        "success": true,
        "error": "Wrong credentials"
    },
        "user3": {
        "success": false,
        "error": "Wrong credentials"
    }
}

var myKeys = [];
angular.forEach(list, function (value, user) {
    if (value.success == true) {
        alert(user)
        myKeys.push(user)
    }
});