login success redirect laravel depend on role

You can do this handle the request in the Middleware RedirectIfAuthenticated.php inside the handle function like this:

/**
 * Handle an incoming request.
 *
 * @param  \Illuminate\Http\Request  $request
 * @param  \Closure  $next
 * @param  string|null  $guard
 * @return mixed
 */
public function handle($request, Closure $next, $guard = null)
{
    if (Auth::guard($guard)->check()) {
        if (Auth::user()->role == 'admin') {
            return redirect('/admin');
        }else{
            return redirect('/');
        }
    }

    return $next($request);
}