I have fulfilled all the requirements from the documentation of Amazon Appstore DevTest for IAP, but I keep getting the AUTH_TOKEN_VERIFICATION_FAILURE error.
1761602866.836 20154 Kiwi Debug CommandResultVerifier: Verifying auth token: com.app.packagename
1761602866.836 900 AmazonOomAdj Debug Skip overriding Tahoe u0 process, pid: 5742
1761602866.839 20154 Kiwi Debug DataAuthenticationKeyLoaderV3: Loading data authentication key…
1761602866.839 20154 Kiwi Debug DataAuthenticationKeyLoaderV3: Checking KiwiDataStore for key…
1761602866.839 20154 Kiwi Debug ExpirableValueDataStore: Fetching value: DATA_AUTHENTICATION_KEY
1761602866.839 20154 Kiwi Debug ExpirableValueDataStore: Value not present in store, returning null
1761602866.839 20154 Kiwi Debug DataAuthenticationKeyLoaderV3: Key was cached: false
1761602866.839 20154 Kiwi Debug DataAuthenticationKeyLoaderV3: Loading authentication key from apk…
1761602866.841 20154 Kiwi Debug DataAuthenticationKeyLoaderV3: Placing auth key into storage
1761602866.841 20154 Kiwi Debug ExpirableValueDataStore: Placing non-expiring value into store with key: DATA_AUTHENTICATION_KEY
1761602866.841 20154 Kiwi Debug SignatureVerifier: Verifying signature of data: ‘BHnJ…6B8=’, signature: ‘com.app.packagename’, with key: 'OpenSSLRSAPublicKey{modulus=b6cnd…,publicExponent=10001}
1761602866.842 20154 Kiwi Debug AbstractCommandTask: Exception occurred while processing task: com.amazon.a.a.n.a.a.a: AUTH_TOKEN_VERIFICATION_FAILURE: null: null
com.amazon.a.a.n.a.a.a: AUTH_TOKEN_VERIFICATION_FAILURE: null: null
at com.amazon.a.a.n.a.b.a(SourceFile:6)
at com.amazon.a.a.n.a.a.a(SourceFile:35)
at com.amazon.a.a.n.a.a.a(SourceFile:16)
at com.amazon.a.a.n.c.b.f(SourceFile:65)
at com.amazon.a.a.n.c.b.a(SourceFile:2)
at com.amazon.a.a.n.b.b$1.run(SourceFile:81)
at android.os.Handler.handleCallback(Handler.java:938)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:223)
at android.os.HandlerThread.run(HandlerThread.java:67)
1761602866.842 20154 Kiwi Error AbstractCommandTask: On Exception!!!: com.amazon.a.a.n.a.a.a: AUTH_TOKEN_VERIFICATION_FAILURE: null: null