setAPIAuthParams

Set SDK authentication parameters

/**
 * Set the SDK authentication parameters
 *
 * @param _clientKey - API client key
 * @param _clientSecret - API client secret
 * @param error -  set to non-nil if failed
 */
- (void) setAPIAuthParams: (NSString*) _clientKey
             clientSecret: (NSString*) _clientSecret
                    error: (NSError**) error;