How to change JSON response on JWT Authentication for WP-API? - php

Question

I have used "JWT Authentication for WP-API" plugin to login and to generate a token.
On the JSON response I have only some data from the wp_users table.
How can I change it to take some others value from wp_usermeta table on response, because I want to know user status level.

Answer 1

You need to use the filters jwt_auth_token_before_sign or jwt_auth_token_before_dispatch.
The first filter receives the token data, and a user object.
In another plugin or in your theme, you'd need to call add_filter.
I'm a bit rusty on my Wordpress, and I do not have a WP instance handy to test this out, but this is the general theory:
Basic example:
add_filter('jwt_auth_token_before_sign', 'add_user_info_jwt', 10, 2);
function add_user_info_jwt($token, $user) {
// fetch whatever information you want from the user, probably using the $user
// object as starting point.
$token['roles'] = implode(',', $user->roles);;
return $token;
}
The $token you receive will have this starting structure and information:
$token = [
'iss' => get_bloginfo( 'url' ),
'iat' => $issuedAt,
'nbf' => $notBefore,
'exp' => $expire,
'data' => [
'user' => [
'id' => $user->data->ID,
]
]
];