Laravel 8 Custom Password Field For Authentication

I have an old app I am trying to port to Laravel 8.  I am trying to use the built in authentication methods without using any of the starter kits or building models.

In the folder app/config/auth.php I have set my users provider for the database.

  'providers' => [
        //'users' => [
        //    'driver' => 'eloquent',
        //    'model' => App\Models\User::class,
        //],


        'users' => [
             'driver' => 'database',
             'table' => 'tLogin',
         ],
    ],

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The password field is not 'password' and I am trying to figure out how to override using the default 'password' name.

As an example, for the login controller, I am getting an error that 'password' does not exist. 

<?php

namespace App\Http\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;

class LoginController extends Controller
{


    /**
     * Handle an authentication attempt.
     *
     * @param  \Illuminate\Http\Request $request
     * @return \Illuminate\Http\Response
     */
    public function authenticate(Request $request)
    {
        $credentials = $request->only('username', 'password');


        if (Auth::attempt($credentials)) {
            $request->session()->regenerate();

            return redirect()->intended('login');
        }

        return back()->withErrors([
            'email' => 'The provided credentials do not match our records.',
        ]);
    }

}

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Should I instead use something like below where I can grab the field names I need for $email and $password like below?

if (Auth::attempt(array('email' => $email, 'password' => $password)))
{    return Redirect::intended('dashboard');
}

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I am just trying to avoid creating models in Laravel as this is an old project already with a lot of data and I feel like it would be faster to go around that.