how to send the verification email using Angular 4 and php laravel 5?

I am pretty new to Angular 4 and have a bit of experience with Laravel 5,Im trying to send email to new user so that they can verify their email address but Im receiving an exception

"message": "Expected response code 250 but got code \"530\", with message \"530-5.5.1 Authentication Required

Authentication required

And this is My Register function

public function signup(Request $request){

    $this-> validate($request,[
        'name' => 'required|string|max:255',
         'email' => 'required|string|email|max:255|unique:users',
         'password' => 'required|string|min:6',

    ]);
    $user = new User([
        'name' => $request-> input('name'),
        'email' => $request-> input('email'),
        'password' => bcrypt( $request-> input('password'))

    ]);
    $user -> save();
    $verifyUser = VerifyUser::create([
        'user_id' => $user->id,
        'token' => str_random(40)
    ]);
    $mailer = app()['mailer'];
    $mailer->to($user->email)->send(new VerifyMail($user));
    return $user;
    
   return response()-> json(['message'=> 'successfully created user'] ,201);
}
public function signin(Request $request){

    $this->validate($request,[
        'email' => 'required|email',
        'password' => 'required'

    ]);
    $credentials = $request->only('email','password');
    try{
       if (!$token =JWTAuth::attempt($credentials)){
        return response()->json(['error'=> 'Invalid Credentials!'] ,404);

       }
    }catch(JWTException $e){
        return response()->json(['error'=> 'Could not create Token!'] ,500);

    }
    return response()->json(['token'=> $token] ,200);

}

and in my .env

MAIL_DRIVER=smtp
MAIL_HOST=smtp.gmail.com
MAIL_PORT=587
MAIL_USERNAME=refkakaramti@gmail.com
MAIL_PASSWORD=root
MAIL_ENCRYPTION=tls

and this my function in my angular

 Signup(info){
    console.log(info);
    var data = JSON.stringify(info);
    return this.http.post(this.server +"signup" , data, this.options).map(res => res.json());
  }

some one help me what should have I add in my angular 4 to make it work

via Chebli Mohamed