npm i

npm run serve

// Create obj for rendering
var hbsObject = {
    username: req.user.username,
    recentGroups: [],
    userGroups: []
};

// Find most recently created groups
models.Group.findAll({
    limit: 5,
    order: 'id DESC'
})

// Create a loop through function that is called recursively
.then(function loopThrough(recentGroups, counter) {

    // Set counter
    if (counter === undefined) counter = 0;
    if (counter >= recentGroups.length) {
        cb() // Callback function to get out of recursive loop and continue
        return
    }

    // Get groupname and totalusers
    var obj = {
        groupname: recentGroups[counter].dataValues.groupname,
        totalusers: recentGroups[counter].dataValues.totalusers
    }

    // Check if total users is reached
    if (obj.totalusers === 4) {

        obj.joined = true; // Even though not actually joined, it does not display ability to join

        // Push obj to recent groups
        hbsObject.recentGroups.push(obj);

        // Recursion
        counter++;
        loopThrough(recentGroups, counter)

    } 
    
    // If user can be added
    else {

        // Check if user is in group
        recentGroups[counter].getUsers({where : {username: req.user.username}})

        .then(function(results) {

            // If no result, user is not in group
            if (results.length === 0)
                obj.joined = false;
            else
                obj.joined = true;

            // Push obj to recent groups
            hbsObject.recentGroups.push(obj);

            // Recursion
            counter++;
            loopThrough(recentGroups, counter)

        });
    }               

});