var userArray = [
    {
        name: "John",
        email: "John@email.com"

    },
    {
        name: "Jane",
        email: "jane@email.com"
    }];

var functionOne = function() {
    //returns Promsie object
};

var functionTwo = function() {
    //returns promise object
};

var createUser = function(user) {
    return User.findOrCreate({email: user.email},{
        name: user.name,
        email: user.email
    });
};

functionOne()
    .then(functionTwo)
    .each(createUser(userArray))
    .then(function onComplete() {
        console.log("Complete");
    })
    .catch(function onError() {
        console.log("Um...it's not working");
    });