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I am trying to build a tree structure by traversing a given ID and attaching its child to the tree. It always assigns user.children = 'sample' instead of fetched user children from user.children = usrChild, also tried usrArr[index].children = 'sample'

What I am trying to implement:
using a userID, I will fetch its children, now for each children i will fetch their children until there are no children left.

function UserProfile.getUserChildren returns a promise with data consisting of all the children.
Now, we iterate each children and fetch their children

Output Expected Visually:

Programatically What I am expecting:

[
 
 text: 
 userID: 1
 name: 'Mike'
 ,
 children:[
 
 text: 
 userID: 2
 name: 'John'
 ,
 children [
 
 text: 
 userID: 4
 name: 'Hero'
 ,
 children []
 
 ]
 ,
 
 text: 
 userID: 3
 name: 'Kelvin'
 ,
 children []
 

 ]
 
]

Code in Node JS:

let UserProfile = require('./UserProfile');

// Love Dad 83273010
let userID = 51405009;
var allDistributors = Array();
 rootUser = new Object();
 rootUser.text = userID:userID,name:'Root';
 rootUser.children = [];
function getUserTree(userID)
 return new Promise( (resolve,reject) => 
 /*
 * UserDownline Return User child Array
 * Format: 
 * [
 * text: 
 * userID: 45
 * name: 'Mike'
 * ,
 * children:[] 
 * 
 * ]
 * 
 */
 UserProfile.getUserChildren(userID).then(async (data) => 
 if(data.length > 0)
 rootUser.children = data;
 /*
 * Iterating each user to fetch and assign its child
 */
 await rootUser.children.forEach(async (user,index,usrArr) => 

 user.children = 'sample'

 await getUserTree(user.text.title).then( async(usrChild) => 
 /*
 Assigning child to root user
 */
 usrArr[index].children = usrChild; // STILL NOT ABLE TO ASSIGN VALUE and return user.children as 'sample'
 ).then(resolve(rootUser));



 );
 //resolve(rootUser)
 //console.log(rootUser)
 //return Promise.all(rootUser);
 else
 resolve([]); // return empty child when no child exist
 );
 //return rootUser.children;

 //console.log(rootUser);
 );



//console.log(JSON.stringify(rootUser));
getUserTree(userID).then((data) => 
 console.log(JSON.stringify(data));
);

As Jaromanda X pointed out, rootUser.children.foreach returns undefined instead of a promise. Consider using rootUser.children.map instead. That returns an array of Promises that you can await on using Promise.all, which returns a promise of an array. Since map does not modify the original array, you would need to assign rootUser.children to the awaited result of Promise.all