how to change email to phone number in laravel auth code example

Example 1: login with email and phone laravel

protected function credentials(Request $request)
        {
          if(is_numeric($request->get('email'))){
            return ['phone'=>$request->get('email'),'password'=>$request->get('password')];
          }
          elseif (filter_var($request->get('email'), FILTER_VALIDATE_EMAIL)) {
            return ['email' => $request->get('email'), 'password'=>$request->get('password')];
          }
          return ['username' => $request->get('email'), 'password'=>$request->get('password')];
        }

Example 2: laravel auth login with phone or email

<?php

namespace App\Http\Controllers\Auth;

use App\Http\Controllers\Controller;
use App\Providers\RouteServiceProvider;
use Illuminate\Foundation\Auth\AuthenticatesUsers;
use Illuminate\Http\Request;
use Illuminate\Validation\ValidationException;

class LoginController extends Controller
{
    /*
    |--------------------------------------------------------------------------
    | Login Controller
    |--------------------------------------------------------------------------
    |
    | This controller handles authenticating users for the application and
    | redirecting them to your home screen. The controller uses a trait
    | to conveniently provide its functionality to your applications.
    |
    */

    use AuthenticatesUsers;

    /**
     * Where to redirect users after login.
     *
     * @var string
     */
    protected $redirectTo = RouteServiceProvider::HOME;

    /**
     * Create a new controller instance.
     *
     * @return void
     */
    public function __construct()
    {
        $this->middleware('guest')->except('logout');
    }

    /**
     * Get the failed login response instance.
     *
     * @param  \Illuminate\Http\Request  $request
     * @return \Symfony\Component\HttpFoundation\Response
     *
     * @throws \Illuminate\Validation\ValidationException
     */
    protected function sendFailedLoginResponse(Request $request)
    {
        throw ValidationException::withMessages([
            'username' => [trans('auth.failed')],
        ]);
    }

    /**
     * Get the login username to be used by the controller.
     *
     * @return string
     */
    public function username()
    {
        $login = request()->input('username');

        if(is_numeric($login)){
            $field = 'phone';
        } elseif (filter_var($login, FILTER_VALIDATE_EMAIL)) {
            $field = 'email';
        } else {
            $field = 'username';
        }

        request()->merge([$field => $login]);

        return $field;
    }
}