Amazon-cognito-identity-js: get sub on signup

[sehmaschine]

First off, thanks for this library – it's been working great so far.

I have one last issue though: When a user registered, I need to add an entry to my user table with a reference to sub (in order to later get the logged-in user).

If I'm not mistaken, I can only get sub with getUserAttributes which is only possible with an authenticated user. Is there a way to get sub when the user has registered (or confirmed the registration)?

[collinforrester]

Wondering how to do the same.

seems like it could be put on the response from signUp. Have you found any work arounds?

[aaronelasticmedia]

@sehmaschine can you describe your use case in more detail?

[sehmaschine]

@aaronelasticmedia I'm having a database with a user table (and lots of relations to the user). This table has a primary key (ID) and a field sub. I'm mainly using the internal ID in order to reference the user (makes testing and writing fixtures much easier). Therefore, I need to create an entry within that table once a new user registered.

@collinforrester The current workaround is this: Instead of creating the user entry on signup I add the user with the first login. I check if an entry with sub already exists with the internal user table and I create a new entry if it doesn't.

With my API, I'm using the token to get sub and then I query the internal user table to get the user ID. I hope my use case is understandable.

I'm just surprised that signup does return username instead of sub – although sub is the unique value which actually identifies the user.

[itrestian]

We are working on a feature to return the sub on the sign up call. This will be available in the near future.

[sehmaschine]

@itrestian That's great news. IMO, the unique identifier (sub) should be available with every response with regards to a user (except when I ask for certain attributes specifically).

[jogold]

@sehmaschine why don't you save your internal ID as a custom attribute in Cognito ?

[sehmaschine]

@jogold Mainly because the registration could fail and then I end up with a user in my database which needs to be deleted (when I create that user beforehand). Doesn't seem like a clean solution IMHO.

[itrestian]

Are you using javascript? Or what is the SDK/language that you are using?

[sehmaschine]

Yes, javascript.

[SamiSammour]

@itrestian Is there any news of this feature?

[hemstreet]

Stumbled upon this little bug today. Any updates?

[rchall-gladly]

+1 to include the sub in the signup response

[chetanme]

SignUp API now returns sub in response.

[MoveLabs]

The response from Use Case 1 (in README) still does not return userSub.

It seems like /src/CognitoUserPool.js needs an update to explicitly include userSub: data.userSub after line 98:

    var returnData = {
        user: new _CognitoUser2.default(cognitoUser),
        userConfirmed: data.UserConfirmed,
        userSub: data.userSub
    };

As a reminder, User Case 1 is as follows:

    userPool.signUp('username', 'password', attributeList, null, function(err, result){
        if (err) {
            alert(err);
            return;
        }
        cognitoUser = result.user;
        console.log('user name is ' + cognitoUser.getUsername());
    });

Thanks!

[itrestian]

The sub should be available in the newest version.

[gchokeen]

How can I get this update? I am using [email protected]

[rchall-gladly]

I'm still not able to get the sub after a signup.
I'm using "amazon-cognito-identity-js": "1.19.0" and "aws-sdk": "2.84.0".
Can someone guide me in the right direction.
This is what I'm getting in my response:

{
  user:CognitoUser
  userConfirmed:true
  userSub:undefined
}

Thanks before hand

[e-9]

I get the sub after updating this 3:

1- https://github.com/aws/aws-sdk-js
2- https://raw.githubusercontent.com/aws/amazon-cognito-identity-js/master/dist/aws-cognito-sdk.min.js
3- https://raw.githubusercontent.com/aws/amazon-cognito-identity-js/master/dist/amazon-cognito-identity.min.js

[scheler]

@sehmaschine - once you have 'sub' of the new user how do you pass it to the backend in a reliable way, avoiding fake submissions?

[sehmaschine]

@scheler We decided to dump cognito in favor of a custom solution (for a variety of reasons). Therefore, I'm not able to answer your question. But if I remember it correctly, we did not pass sub to the backend but used the access token instead. On login we return the user object which contains sub.