sms-gateway/app/Http/Controllers/AdminController.php

<?php

namespace App\Http\Controllers;

use App\Models\User;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Hash;

class AdminController extends Controller
{
    public function showLoginForm()
    {
        return view('admin.login');
    }

    public function login(Request $request)
    {
        $credentials = $request->only('email', 'password');
        $user = User::where('email', $credentials['email'])->first();
        if (!$user || !Hash::check($credentials['password'], $user->password)) {
            return back()->withErrors([
                'email' => 'The provided credentials do not match our records.',
            ]);
        }else{
            auth()->login($user);
            return redirect()->intended('admin/dashboard');
        }
    }

    public function dashboard()
    {
        return view('admin.dashboard');
    }
}