Next, we need to get your API key. To do this, go to https://webeditor.styly.cc/ and log in to your Styly account. Once you are logged in, select the “API Key” menu option, and copy your API key from this page.
Return to Unity. You should also now have a new drop-down menu option named “STYLY” at the top on your screen. Select this menu options and go to STYLY > Asset Uploader Settings.
Enter the email address associated with your Styly account and paste in your API key.
Now you are able to upload prefabs to Styly.