Undefined variable error (noob question)

<?php
namespace App\Http\Controllers;
use Input;
use Illuminate\Support\Facades\Redirect;
use App\User;
use Hash;
class AccountController extends Controller {
    
    public function getCreate(){
        
     return \View::make('account.create');   
    }
    
    public function postCreate(){
        
        $validator= \Validator::make(input::all(),
        array(
            'email'=>'required|max:50|email|unique:users',
            'username'=>'required|max:20|min:3|unique:users',
            'password'=>'required|min:6',
            'password_again'=>'required|same:password'
            ));
            
            if($validator->fails()){
                
                return Redirect::route('account-create')
                       ->withErrors($validator)
                       ->withInput();
                
            }else{
                
                //create account
                
                $email = Input::get('email');
                $username = Input::get('username');
                $password = Input::get('password');
                //Activation code
                $code=str_random(60);
                
                $create = User::create(array(
                    'email'=>$email,
                    'username'=>$username,
                    'password'=>Hash::make($password),
                    'code'=>$code,
                    'active'=>0
                    ));
                    if($user){
                        return Redirect::route('home')
                        ->with('global',"sent email");
                        
                        
                    }
                    }
                
            }
        
        
    }