Sequelize not creating Junction tables for many-to-many relationships

I don't see the junction tables getting created for my code below (for UserEvents as:Attendees). When I try to add 'Attendee' to an Event using event.setAttendees([user]), it sets the EventId on the user table (thus making it a one-to-many relationship)

During sync logging, no tables with 'userevents' related name gets created

var User = db.import(__dirname + '/user');
var Event = db.import(__dirname + '/event');

Event.hasMany(User, { as: 'Attendees'});
User.hasMany(Event);

db.sync({logging: console.log}).success(function() {
  logger.info('DB Initialization successful!');
  createDefaultData()
}).error(function(err) {
  logger.error('DB Initialization failed!', err);
});

var createDefaultData = function() {

  User.create({email:"test@test.com", firstName: "tolga", lastName: "ekmen", password: "qwer", location: "13424"});
}