How to add other variables in the API response?

Hello, when I make a request the response carries this information:

{ "token": "example_token", "user_email": "example@example.example", "user_nicename": "example-pw", "user_display_name": "example-user", }

I need to add user_id as a variable included in the response, I have edited in this file public/class-jwt-auth-public.php and in the line num #196 I have edited this code:

/** The token is signed, now create the object with no sensible user data to the client*/	$data = [	'token' => $token,	'user_email' => $user->data->user_email,	'user_nicename' => $user->data->user_nicename,	'user_display_name' => $user->data->display_name,	];

to this code:

/** The token is signed, now create the object with no sensible user data to the client*/	$data = [	'token' => $token,	'user_email' => $user->data->user_email,	'user_nicename' => $user->data->user_nicename,	'user_display_name' => $user->data->display_name,	'user_id' => $user->data->user_id,	'userId' => $user->data->id,	];

I have tried $user->data->user_id and $user->data->id but the code didn’t work the response back NULL in the user_id and userId

this is the response:

{ "token": "example_token", "user_email": "example@example.example", "user_nicename": "example-pw", "user_display_name": "example-user", "user_id": null, "userId": null, }

Any help please?