laravel custom validation message

1$rules = [
2        'name' => 'required',
3        'email' => 'required|email',
4        'message' => 'required|max:250',
5    ];
6
7    $customMessages = [
8        'required' => 'The :attribute field is required.'
9    ];
10
11    $this->validate($request, $rules, $customMessages);

1
2@if ($errors->any())
3    <div class="alert alert-danger">
4        <ul>
5            @foreach ($errors->all() as $error)
6                <li>{{ $error }}</li>
7            @endforeach
8        </ul>
9    </div>
10@endif
11

1if (request('event') == null) {
2    $validator->errors()->add('event', 'Please select an event');
3}

1$this->validate([
2  'userid' =>'required|min:3|max:100',
3  'username' =>'required|min:3',
4  'password' =>'required|max:15|confirmed',
5], [], [
6  'userid' => 'User ID'
7]);

1$rules = [
2        'name' => 'required',
3        'email' => 'required|email',
4        'message' => 'required|max:250',
5    ];
6
7    $customMessages = [
8        'required' => 'The :attribute field is required.'
9    ];
10
11    $this->validate($request, $rules, $customMessages);
12

1/**
2 * Store a new blog post.
3 *
4 * @param  Request  $request
5 * @return Response
6 */
7public function store(Request $request)
8{
9    $validatedData = $request->validate([
10        'title' => 'required|unique:posts|max:255',
11        'body' => 'required',
12    ]);
13
14    // The blog post is valid...
15}