laravel use validator not on request code example

Example 1: email validation in laravel

'email' => 'required|email|unique:users,email',
//@sujay

Example 2: laravel validation

/**
 * Store a new blog post.
 *
 * @param  Request  $request
 * @return Response
 */
public function store(Request $request)
{
    $validatedData = $request->validate([
        'title' => 'required|unique:posts|max:255',
        'body' => 'required',
    ]);

    // The blog post is valid...
}

Example 3: validate field for existing client laravel

unique:users,username,id,1 // table, field, idcolumn, value to ignore