...

This option creates the connection using the default SkySync client application credentials assigned to the SkySync application by the platform provider.

...

Use Custom Client Credentials

This option allows you to use custom client credentials provided by your administrator. When selected, two additional fields will be available to enter the credentials: Client ID and Client Secret. You'll use these fields to enter the Client ID and Client Secret for your platform account. SkySync will use this information to access the platform. 

...