JulianAR97

<script>
	let username, password
	// will be set by userbase
	let userObj = null
	const userbase = window.userbase
	// Userbase initializer
	let authProm = userbase.init({appId: 'your appId from Userbase'})
		.then(({user}) => userObj = user)
	
	// Very simple authentication functions

JulianAR97

let sum = 0 // sum will be added to all 'less than' nodes
const convertBST = (root) => { 
    if (root == null) return; 
    convertBST(root.right); // traverse right
    sum += root.val; // add root value to 'global' sum
    root.val = sum; // new value becomes sum of all values that have already been seen
    convertBST(root.left) // traverse left
    return root;
}