Undefined variables when using view files

[theninthnode]

I'm trying to use view files to send the emails but I'm having trouble accessing the variables passed in. Am I doing this correctly? I'm getting message in view: Undefined variable: user

Message::send(function($message) use ($user){
                $message->to($user->email);
                $message->from('billyjones25@gmail.com', 'Website name');

                $message->user = $user;

                $message->subject('Welcome!');
                $message->body('view: emails.welcome');
}); 

View:

Hi {{$user->first_name}}!

Thanks for joining ______. We listed your sign in details below, make sure you keep them safe.

Your username: {{$user->username}}
Your email address: {{$user->email}}
Password: {{$user->password}}

[loic-sharma]

You need to do:

$message->body->user = $user;

See if that works.

[theninthnode]

That works perfect! Thanks, Billy