how to change validation message in laravel

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$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//@sujay

1$messages = [
2        'exists' => 'Your custom message',
3    ];
4    $this->validate($request, [
5    'recovery_code' => 'required|exists:users,email_recovery_code',
6    'new_password'=>'required',
7    'confirm_password'=>'required|same:new_password',
8    ],$messages);