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Custom Claims in Auth0 Rules

Custom Claims

Custom claims inside the JWT are used to tell Hasura about the role of the caller, so that Hasura may enforce the necessary authorization rules to decide what the caller can and cannot do. In the Auth0 dashboard, navigate to Rules.

Add the following rule to add our custom JWT claims under hasura-jwt-claim:

function (user, context, callback) {
const namespace = "https://hasura.io/jwt/claims";
context.accessToken[namespace] =
{
'x-hasura-default-role': 'user',
// do some custom logic to decide allowed roles
'x-hasura-allowed-roles': ['user'],
'x-hasura-user-id': user.user_id
};
callback(null, user, context);
}

Custom JWT Claims Rule

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