NullPointerException when errorDescription is null

Checklist

[X] The issue can be reproduced in the Auth0.Android sample app (or N/A).
[X] I have looked into the Readme, Examples, and FAQ and have not found a suitable solution or answer.
[X] I have looked into the API documentation and have not found a suitable solution or answer.
[X] I have searched the issues and have not found a suitable solution or answer.
[X] I have searched the Auth0 Community forums and have not found a suitable solution or answer.
[X] I agree to the terms within the Auth0 Code of Conduct.

Description

Auth0 will send an unauthorized error but the errorDescription will be null causing a NullPointerException inside of the expected AuthenticationException. throw AuthenticationException(ERROR_VALUE_UNAUTHORIZED, errorDescription!!)

I look in the code and it's null because: CallbackHelper.asMap testing for value==2 but for errorDescription it's value==3 "error_description=Please verify your email before logging in.e=foo+t2@gmail.com" So the key "error_description" is never set and then "OAuthManager.assertNoError" will crash with a NullPointerException.

Original app trace: java.lang.RuntimeException: Unable to resume activity {com.MY_PACKAGE.app/com.auth0.android.provider.AuthenticationActivity}: java.lang.NullPointerException at android.app.ActivityThread.performResumeActivity(ActivityThread.java:4770) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:4803) at android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:57) at android.app.servertransaction.ActivityTransactionItem.execute(ActivityTransactionItem.java:45) at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:179) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2303) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loopOnce(Looper.java:201) at android.os.Looper.loop(Looper.java:288) at android.app.ActivityThread.main(ActivityThread.java:7884) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936) Caused by: java.lang.NullPointerException at com.auth0.android.provider.OAuthManager.assertNoError(OAuthManager.kt:203) at com.auth0.android.provider.OAuthManager.resume(OAuthManager.kt:95) at com.auth0.android.provider.WebAuthProvider.resume(WebAuthProvider.kt:77) at com.auth0.android.provider.AuthenticationActivity.deliverAuthenticationResult$auth0_release(AuthenticationActivity.kt:86) at com.auth0.android.provider.AuthenticationActivity.onResume(AuthenticationActivity.kt:54) at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1564) at android.app.Activity.performResume(Activity.java:8473) at android.app.ActivityThread.performResumeActivity(ActivityThread.java:4760) at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:4803) at android.app.servertransaction.ResumeActivityItem.execute(ResumeActivityItem.java:57) at android.app.servertransaction.ActivityTransactionItem.execute(ActivityTransactionItem.java:45) at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:179) at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2303) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loopOnce(Looper.java:201) at android.os.Looper.loop(Looper.java:288) at android.app.ActivityThread.main(ActivityThread.java:7884) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)

Reproduction

1- Sign up with a new account without validating the email (ex. foo+t2@gmail.com). 2- Close the app then try to login with the unvalidated email

auth0 / Auth0.Android