The Nike+ API is open only to Nike+ partners. For inqueries regarding partnerships, refer to the Contact
page. Also, the application is required to whitelist the Callback URI(s) prior to the authentication flows working successfully.
If multiple applications are going to be using the same Client ID on multiple sites, and the required behavior is to not use the same authentication data for a user on both sites, the sitePrefix setting will need to be used. The SDK stores authentication data with a namespace created by the combination of the data with the client id. Adding a unique sitePrefix per site further namespaces the data with the provided sitePrefix.