I'm missing default items from my Rocket League Sideswipe Garage

If you find you're missing the default Rocket League Sideswipe items, such as the default Octane, follow the steps below to synchronize your Garage: 

1. In Rocket League Sideswipe, select the Gear icon.
2. Select Other Settings.
3. Click on the Logout button.
4. Select Login with Epic Games and then log back into your account. 
5. Check your Garage again.