By default, a UUID is issued as an id_token in WSO2 Identity Server, which is of the first type above. But, it also can be configured to issue a self-contained id_token (JWT), which is of the second type above.

- Open the `<IS_HOME>/repository/conf/identity/identity.xml` file and uncomment the following entry under `<OAuth>` element.

```
<IdentityOAuthTokenGenerator>org.wso2.carbon.identity.oauth2.token.JWTTokenIssuer</IdentityOAuthTokenGenerator>
```

    public void insert(CrawlingInfo entity) {
        doInsert(entity, null);
    }

    public void insert(CrawlingInfo entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(CrawlingInfo entity) {
        doUpdate(entity, null);
    }

    public void insert(ElevateWord entity) {
        doInsert(entity, null);
    }

    public void insert(ElevateWord entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(ElevateWord entity) {
        doUpdate(entity, null);
    }

    public void insert(PathMapping entity) {
        doInsert(entity, null);
    }

    public void insert(PathMapping entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(PathMapping entity) {
        doUpdate(entity, null);
    }

    public void insert(FileAuthentication entity) {
        doInsert(entity, null);
    }

    public void insert(FileAuthentication entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(FileAuthentication entity) {
        doUpdate(entity, null);
    }

    public void insert(ClickLog entity) {
        doInsert(entity, null);
    }

    public void insert(ClickLog entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(ClickLog entity) {
        doUpdate(entity, null);
    }

    public void insert(Role entity) {
        doInsert(entity, null);
    }

    public void insert(Role entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(Role entity) {
        doUpdate(entity, null);
    }

    public void insert(FailureUrl entity) {
        doInsert(entity, null);
    }

    public void insert(FailureUrl entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(FailureUrl entity) {
        doUpdate(entity, null);
    }

    public void insert(RequestHeader entity) {
        doInsert(entity, null);
    }

    public void insert(RequestHeader entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(RequestHeader entity) {
        doUpdate(entity, null);
    }

    public void insert(ThumbnailQueue entity) {
        doInsert(entity, null);
    }

    public void insert(ThumbnailQueue entity, RequestOptionCall<IndexRequestBuilder> opLambda) {
        entity.asDocMeta().indexOption(opLambda);
        doInsert(entity, null);
    }

    public void update(ThumbnailQueue entity) {
        doUpdate(entity, null);
    }