undefined variable view

Hello guys, So, bought a php script on some site, and for the life of my I cannot reach the dev. I scourged google, but I have no understanding of laravel... I have 2 bugs that stop me from using the script, so I ask for some help here...

It seems I have 2 variables which are undefined and won't allow me to login, neither as a user, nor as admin.

code1 and coins

First:

Undefined variable: code1 (View: C:\laragon\www\ventz\app\resources\views\auth\login.blade.php)

My RedirectifAutenthicated.php

    public function handle($request, Closure $next, $guard = null)
    {
        if (Auth::guard($guard)->check()) {
            return redirect('user/home');
        }
        return $next($request);
    }
}

My login.blade.php

   <? $code1 = substr(str_shuffle('ABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890') , 0 , 5 );?>
                                 <div class="form-group">
                                 <b>Code: {{$code1}}</b>
                                   <script>
                                    function myFunction() {
                                     var code = $('#usd').val() ;
                                     var a = "{{$code1}}";
                                     if(code ==  a){
                                     document.getElementById("show").innerHTML = "<br><button type='submit' class='btn btn-bg--primary btn-size--md btn-hover--3d'>Sign In</button>"; }

                                     else
                                     {

                                      document.getElementById("show").innerHTML = "<p class='text-danger'>Please enter a correct code to activate login button</p>";
                                     }
                                     };
                                    </script>

                                    <input type="email" class="form-control" id="usd" onkeyup="myFunction()"   placeholder="Enter Code" required/>

And second :coins

Undefined variable: coins (View: C:\laragon\www\ventz\app\resources\views\include\admindashboard.blade.php) 

My admindashboard.blade.php

<? $coins = DB::table('coins')->get(); ?>
@foreach($coins as $data)
<li><a href="{{route('admin.blockchainwallet', $data->id)}}"><em class="text-primary cf cf-coin"></em>&nbsp;  {{$data->name}}</a></li>
@endforeach

Could you please give some hints? Can this be fixed? Thank you