FairPlay > SPC > streamingContentKeyRequestData > App Identifier
<p>Can someone please clarify what is 'appIdentifier' in below function?</p>

<p>func streamingContentKeyRequestData(forApp appIdentifier: Data, contentIdentifier: Data, options: [String : Any]? = nil) throws -> Data</p>

<p>Is it something bundled within the Apple TV app or do we need to get it from server? Please explain it with example.</p>