name : CanonicalizeUsername.php <?php namespace Laravel\Fortify\Actions; use Illuminate\Support\Str; use Laravel\Fortify\Fortify; class CanonicalizeUsername { /** * Handle the incoming request. * * @param \Illuminate\Http\Request $request * @param callable $next * @return mixed */ public function handle($request, $next) { $request->merge([ Fortify::username() => Str::lower($request->{Fortify::username()}), ]); return $next($request); } }