Flutter PKCE config auth0

[jeremals]

Hello,
I followed the auth0 integration tutorial on flutter and I have this error :

**E/PKCE ( 4466): Unable to complete authentication with PKCE. PKCE support can be enabled by setting Application Type to ‘Native’ and Token Endpoint Authentication Method to ‘None’ for this app at ‘https:// … configpage’ **
( 4466): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: access_denied: Unauthorized

My app is native on auth0.com and I have no Available Credentials selected

Here is my config :
**manifestPlaceholders = [auth0Domain: “dev-xxxxxxxxxxxxxxx.us.auth0.com”, auth0Scheme: “flutterdemo”] **
applicationId “com.auth0.clicker”

And my callback URL :
flutterdemo://dev-xxxxxxxxxxxxxxx.us.auth0.com/android/com.auth0.clicker/callback

method : final credentials = await widget.auth0.webAuthentication(scheme: “flutterdemo”).login(redirectUrl : ‘flutterdemo://dev-xxxxxxxxxxxxxxx.us.auth0.com/android/com.auth0.clicker/callback’);

I think I forgot something but I don’t know what … anyone have a solution ?

PS : I already identified myself previously but my callback URL was bad. So I don’t know if the problem occurs during automatic identification or not.

[tyf]

Hello there @jeremals welcome to the community!

@jeremals

**E/PKCE ( 4466): Unable to complete authentication with PKCE. PKCE support can be enabled by setting Application Type to ‘Native’ and Token Endpoint Authentication Method to ‘None’ for this app at ‘https:// … configpage’ **
( 4466): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: access_denied: Unauthorized

Just to be sure, can you confirm that the application type for the client id being configured in your Flutter app is set to Native in your Auth0 dashboard?

I might also recommend taking a look at our Flutter sample app and configuring it using the same client id, callback url, scheme, etc. to see if you can reproduce the error there - This might help us narrow down any potential issue.

Cheers!

[jeremals]

Hello,

Thank you for your answer.

My configuration seems correct and I have “native” selected on the dashboard :

I also have this line above the error that I forgot on my first post :

D/OAuthManager(22210): The parsed CallbackURI contains the following parameters: [code, state]
V/CustomTabsController(22210): Trying to unbind the service
E/PKCE (22210): Unable to complete authentication with PKCE. PKCE support can be enabled by setting Application Type to ‘Native’ and Token Endpoint Authentication Method to ‘None’ for this app at ‘https://manage.auth0.com/#/applications/xxxxxxxxxxxxxxxxxxxxxxxx/settings’.
E/flutter (22210): [ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: access_denied: Unauthorized
I/m.auth0.clicke(22210): oneway function results will be dropped but finished with status OK and parcel size 4

but :

[jeremals]

My bad

[tyf]

Hey @jeremals thanks for following up - That’s interesting, the Native app type in my dashboard doesn’t have the credentials tab. It’s set to none by default