title: Access App Identifier Prefix programmatically
body: <p>How can I access the Bundle Seed ID/Team ID/App Identifier Prefix string programmatically?  (These are all the same thing as far as I can tell).</p>
  
  <p>I am using the UICKeychainStore keychain wrapper to persist data across several applications.  Each of these applications has a shared keychain access group in their entitlement plists, and share the same provisioning profile.  By default, the keychain services use the first access group in the plist as the access group to save data to.  This looks like "AS234SDG.com.myCompany.SpecificApp" when I debug UICKeychainStore.  I would like to set the access group to "AS234SDG.com.myCompany.SharedStuff", but I can't seem to locate how to get the "AS234SDG" string of the access group programmatically, and would like to avoid hard-coding it if possible. </p>