MaikuB / MaikuB/flutter_appauth

token_failed, Failed to get token

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Description

I'm getting the following error after 3 attempts of a successful token refresh method calls in the 4th attempt I'm getting the following error:

`PlatformException(token_failed, Failed to get token: invalid_grant: The refresh token is invalid or expired., null, null)
`

I'm using OKTA for OAuth.

This is my method:

```
final oktaRefresh = await appAuth.token(TokenRequest(
'${Repository.env!['OKTACLIENTID']}',
'${Repository.env!['OKTAREDIRECTURL']}',
discoveryUrl:
'https://${Repository.env!['OKTADOMAIN']}/oauth2/${Repository.env!['OKTAUTHORIZER']}/.well-known/openid-configuration',
refreshToken: refreshToken,
grantType: "refresh_token",
scopes: ["openid", "profile", "offline_access"]));
```

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No repository file or test is named; start by reproducing the fourth refresh call from the shown Dart TokenRequest and inspect the refresh-token response/error from the Flutter AppAuth wrapper. Done means identifying the cause of the invalid_grant failure and documenting or fixing the relevant behavior.

Written by the indexing model from the issue text.

Assessment

Tech stack
android, dart, flutter, ios
Domain
authentication, mobile
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
30/100

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