AAD OAuth refresh token is null when using aad_oauth library in Flutter

Question

I am using the aad_oauth library in my Flutter app for Microsoft authentication. The authentication flow seems to work, but when I attempt to retrieve the refresh token, it returns null. Also I'm getting the access token and its expiry time

Here’s the relevant part of my code:

 Future<Either<Failure, String>> msAADRefresh() async {
try {
  final AadOAuth oauth = config;
 final refreshToken = await oauth.refreshToken();
  return refreshToken.fold((failure) => left(Failure()),
      (token) => right(token.refreshToken.toString()));
} catch (e) {
  return left(Failure(e.toString()));
}

Note: I have attached all my config in config variable. I'm able to logged in but not getting the refresh token.

Make sure to include offline_access in the scopes when initializing the AadOAuth instance to get the refresh token. — Dasari Kamali
– Dasari Kamali, Commented Jan 27 at 6:54
@DasariKamali could u please provide example?? mine is like this scope = 'api://example.app.com/tenant_id/.default' — Jay Parmar
– Jay Parmar, Commented Jan 27 at 7:11
@DasariKamali I have modified my url bit scopes ="offline_access api://example.app.com/tenant_id/.default' it worked. thanks — Jay Parmar
– Jay Parmar, Commented Jan 27 at 17:36

Dasari Kamali · Accepted Answer · 2025-01-28 05:11:49Z

1

When attempting to retrieve the refresh token using the aad_oauth library in a Flutter app for Microsoft authentication, it returns null because the refresh token requires the offline_access scope to be included.

In Azure Portal, under App Registration-> API permissions -> Add permisson -> offline_access as shown below.

enter image description here

Make sure to add offline_access in the scopes list in your code as shown below.

scopes ="offline_access api://example.app.com/tenant_id/.default"

Output :

enter image description here

answered Jan 28 at 5:11

Dasari Kamali

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