Appsync Resolver no email in claim - amazon-cognito

Question

I have created a resolver that uses the email address ($context.identity.claims.email). I tested my query in the AWS Console "Queries" section and all worked fine as $context.identity.claims looked as expected;
{
sub: 'xxx-xxx-xxx-xxx-xxx',
aud: 'xxxxxxxxx',
email_verified: true,
sub: 'xxx-xxx-xxx-xxx-xxx',
token_use: 'id',
auth_time: 1563643503,
iss: 'https://cognito-idp.ap-southeast-1.amazonaws.com/ap-southeast-1_xxxxx',
'cognito:username': 'xxxx',
exp: 1563647103,
iat: 1563643503,
email: 'xxx#xxx.xxx'
}
All looks good so lets use it in my React App that uses the AWS Amplify code for authentication. Its not working now and that is because there is no "email" in the claim section! It looks like this;
{
sub: 'xxx-xxx-xxx-xxx-xxx',
event_id: 'xxx-xxx-xxx-xxx-xxx',
token_use: 'access',
scope: 'aws.cognito.signin.user.admin',
auth_time: 1563643209,
iss: 'https://cognito-idp.ap-southeast-1.amazonaws.com/ap-southeast-1_xxxx',
exp: 1563646809,
iat: 1563643209,
jti: 'xxx-xxx-xxx-xxx-xxx',
client_id: 'xxxx',
username: 'xxxx'
}
Can anyone help me out as to why the email shows in the AWS Console Query but not when I call it from my own client?

Answer 1

Amplify can be configured to include the current ID Token for each graphql request by passing in a function. Two configuration options are shown in the following:
import { Auth } from 'aws-amplify';
const getIdToken = async () => ({
Authorization: (await Auth.currentSession()).getIdToken().getJwtToken()
});
const aws_exports = {
aws_appsync_graphqlEndpoint: 'https://****.appsync-api.us-east-2.amazonaws.com/graphql',
aws_appsync_region: 'us-east-2',
aws_appsync_authenticationType: 'AMAZON_COGNITO_USER_POOLS',
// OPTION 1
graphql_headers: getIdToken,
// OPTION 2
// API: {
// graphql_headers: getIdToken
// },
Auth: {
identityPoolId: 'us-east-2:********-****-****-****-************',
region: 'us-east-2',
userPoolId: 'us-east-2_*********',
userPoolWebClientId: '*************************',
type: 'AMAZON_COGNITO_USER_POOLS'
}
};
export default aws_exports;
Amplify.configure(awsconfig);
Note the different claims available to the resolver between Access & ID tokens.
Access tokens will provide claims such as client_id, jti, and scope, while ID token claims provide email, phone_number, etc., along with others like aud, cognito:roles and cognito:username.
Access Token
{
"claims": {
"auth_time": 1581438574,
"client_id": "*************************",
"cognito:groups": [
"Admin"
],
"event_id": "ec70594c-b02b-4015-ad0b-3c207a18a362",
"exp": 1581442175,
"iat": 1581438575,
"iss": "https://cognito-idp.us-east-2.amazonaws.com/us-east-2_*********",
"jti": "351d2d5f-13c3-4de8-ba7c-b3c5a9e46ca6",
"scope": "aws.cognito.signin.user.admin",
"sub": "********-****-****-****-************",
"token_use": "access",
"username": "********-****-****-****-************"
},
...
}
ID Token
{
"claims": {
"address": {
"formatted": "1984 Newspeak Dr"
},
"aud": "....",
"auth_time": 1581438671,
"birthdate": "1984-04-04",
"cognito:groups": [
"Admin"
],
"cognito:roles": [
"arn:aws:iam::012345678901:role/us-east-2-ConsumerRole"
],
"cognito:username": "********-****-****-****-************",
"email": "winston.smith#oceania.gov",
"email_verified": true,
"event_id": "e3087488-bfc8-4d08-a44c-089c4ae7d8ec",
"exp": 1581442271,
"gender": "Male",
"iat": 1581438672,
"iss": "https://cognito-idp.us-east-2.amazonaws.com/us-east-2_*********",
"name": "WINSTON SMITH",
"phone_number": "[phone]",
"phone_number_verified": false,
"sub": "********-****-****-****-************",
"token_use": "id"
},
...
}
Tested with amplify-js#2.2.4
Source: https://github.com/aws-amplify/amplify-js/blob/aws-amplify%402.2.4/packages/api/src/API.ts#L86-L107

Answer 2

Guessing that inside your React App, you are retrieving the user attributes with something to the effect of
import { Auth } from 'aws-amplify';
async componentDidMount() {
const currentUser = await Auth.currentUserInfo();
const claims = currentUser.attributes;
// verification logic here, and here you cannot find claims['email']
}
One thing to check is whether the specific React App client can access the 'email' attribute. The client may have been disallowed to specific attributes.
Inside the AWS Cognito Console > User Pools > General Settings > App Clients you should see something like the screen shot below.
Find the specific app client (match the Id). Click on 'Set attribute read and write permissions' - underlined red. There you should be able to select the email attribute as Readable by this client.

Answer 3

I have had a request for a feature in Amplify and I got the following brilliant solution suggestion
TLDR : Update your Auth Provider to create a "pre-token generation" Lambad, and inside your lambda you add another 'fake' group to the claim, as the groups are part of the token passed to AppSync
More details on the solution in this repo
https://github.com/dantasfiles/AmplifyMultiTenant

Answer 4

Ok, so I think they is in the "token_use" element. My original code used this function;
import {API, graphqlOperation} from 'aws-amplify';
import * as queries from '../../graphql/queries';
async function makeCall() {
let resp = await API.graphql(graphqlOperation(queries.getMeta));
return resp.data.getMeta;
}
That code produces the observed above. If I use the following (very dirty but works) code I get the above expected result;
import {Auth, API, graphqlOperation} from 'aws-amplify';
import axios from 'axios';
import * as queries from '../../graphql/queries';
async function makeCall() {
const curSesh = await Auth.currentSession();
const token = curSesh.idToken.jwtToken;
const resp = await axios({
method: 'post',
url: API._options.aws_appsync_graphqlEndpoint,
data: graphqlOperation(queries.getMeta),
headers: {
authorization: token
}
});
return resp.data.data.getMeta;
}
I am not going mark this as solved quite yet as I am sure there is a far cleaner way to get this working. If anyone can shed light on it I would love to learn.