Undefined index "user_id"

[roberttolton]

Hi, thanks for this library - it's working fine for the first user (me), but any subsequent users that try and authenticate with my app are met with an Undefined index "user_id" error from AdamPaterson\OAuth2\Client\Provider\SlackAuthorizedUser->getId().

I can't figure out why it would be successful for one user (me, the one who installed the App into the Workspace) and not for other users?

When I look at $token from $provider->getAccessToken() the scopes are a bit different:

From a flow that worked:
identify,commands,incoming-webhook,channels:read,groups:read,users:read,identity.basic,identity.email,identity.avatar,identity.team

From a flow that didn't work:
identity.basic,identity.email,identity.avatar,identity.team

But the JSON that this scope data comes from, from Slack, is shown as ok and even has the accessToken in the response - it's not like there's a user_id property existing in one and not the other, so I'm kind of at a loss as to which point in the flow the user_id index is missing.

[roberttolton]

So, the request to https://slack.com/api/auth.test is failing, even though a token is being supplied, the response back from Slack is:

{
    "ok": false,
    "error": "invalid_auth"
}

Again, weirdly this only fails with accounts except the first account used - am I missing something basic..?

[qdequippe]

Same error, I tried to online test https://api.slack.com/methods/auth.test/test but I got the same error... I don't understand the Slack documentation...
@roberttolton did you find a way to fix this?

[roberttolton]

I can't quite remember the exact details, but I ended up putting the users through both flows - 'adding' Slack and then 'login-with' Slack. Bit cumbersome, and I'm sure it's not needed, but was the only thing that worked.

I believe the issue was, whether it's this package at fault or not, that the 'added' flow was done under one account, and then subsequent 'login-with' were different users.

[fritzmg]

Same issue here, though I am only trying a 'standard' workflow via knpuniversity/oauth2-client-bundle. The response from

https://slack.com/api/auth.test?token=…

is also

{
    "ok": false,
    "error": "invalid_auth"
}

May be there is something that needs to be set additionally in the App's settings after all? I have only done the minimum, i.e. only provided the callback URL and added the identity.basic and identity.email scopes and that's it basically.