Laravel 5.7 validation makes nothing

My function works by itself but the validation is not executed. Does anyone know what I forgot to add?

This is a snippet of my code:

namespace AppHttpControllers;

use AppPlayer;
use AppTournament;
use IlluminateHttpRequest;
use IlluminateSupportFacadesDB;
use IlluminateSupportFacadesAuth;


    public function store(Request $request)
    {
       $data=$request->all();
$validator = Validator::make($data, [
            'first_name' => 'alpha|min:2|max:30',
        ]);
        
        
        
        if(Auth::check()){

            $foo = Foo::create([
                'first_name' => $request->input('fist_name'),
                'last_name' => $request->input('last_name'),
            ]);
 
            if($foo){
                return redirect()->route('foo.show', ['foo'=> $foo->id])
                ->with('success' , 'Foo created!');
            }
 
        }
         
        return back()->withInput()->with('errors', 'Error when creating the foo');
    }

Thanks in advance

Answers:

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Method 1

try different approach like:

use IlluminateSupportFacadesValidator;

...
$data=$request->all();
$validator = Validator::make($data, [
            'first_name' => 'alpha|min:2|max:30',,  
        ]);

Method 2

    public function store(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'category' => 'required',
        ]);

        //validating input

        if ($validator->fails()) {
            return back()->with('toast_error', $validator->messages()->all()[0])->withInput();
        }
// more code to run when if statement is executed with true for validated data
    }

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0