createCustomToken generates invalid Token

[markbreuss]

When i send the token back to the client and trie the LoginWithToken method I get:
error: [firebase_auth/invalid-custom-token] The custom token format is incorrect. Please check the documentation.

If i paste the token into jwt.io i get the following warning (although I can see the correct payload of the token.
Warning: Looks like your JWT signature is not encoded correctly using base64url (https://tools.ietf.org/html/rfc4648#section-5). Note that padding ("=") must be omitted as per https://tools.ietf.org/html/rfc7515#section-2

I did double check that the projects match and got it to work with the python admin sdk.

Any Ideas?

Thanks Mark

[rrousselGit]

When i send the token back to the client and trie the LoginWithToken method I get:

What does that mean exactly?
Maybe some code samples would help here

[markbreuss]

Of course so my workflow is:

1. HTTP Request to Dart Backend (DartFrog) to get the token

2. On the Server Endpoint I have the following code to generate the token
   auth.createCustomToken(uid, developerClaims: {'role': 'm1_admin'});

3. On the client I use the token I genereated in step 2 to sign in with the flutter client sdk:
   FirebaseAuth.instance.signInWithCustomToken(token);

This is where I get the error:
error: [firebase_auth/invalid-custom-token] The custom token format is incorrect. Please check the documentation.

[gildaswise]

I'm also having this issue, I'm just using the createCustomToken without any claims and I can't use the token with the signInWithCustomToken endpoint. Same error about the formatting

[HeySreelal]

I think #23 fixes this issue. Worked fine for me when I tested a few hours ago.

[kosukesaigusa]

@rrousselGit

Hello!

In the following PR:

#23

the reproducible code sample about this issue is described, and I tried to solve it.

I would greatly appreciate if you have a look at the PR, as some time has passed.

Thank you!

[Fraa-124]

Are there any reasons why hasn't been merged yet? The PR changes are working fine.