I've been trying (and failing) to find where the Xfinity Authenticator app stores the TOTP secret. Nothing in any files in shared_prefs looks like a TOTP key, and I'm beginning to suspect that it's being stored elsewhere. In particular, the com.comcast.xfinityauthenticator_preferences.xml file has the following value in it:
<boolean name="keyCredentialStoredInVault" value="true" />
Any guidance on where to go from here would be appreciated.