MethodNotAllowedHttpException at RouteCollection->methodNotAllowed(array('POST'))

I'm trying to use POST to let user log in with correct email/password. I keep getting this error

MethodNotAllowedHttpException at RouteCollection->methodNotAllowed(array('POST'))

web.php

<?php

use Illuminate\Support\Facades\Route;
use App\Http\Controllers\UserController;

Route::get('/', function () {
    return view('login');
});

Route::post("/login",[UserController::class,'login']);

UserController.php

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;

class UserController extends Controller
{
    //
    function login(request $req)
    {
        return $req->input();
    }
}

login.blade.php

@extends('master')
@section('content')
<div class="container custom-login">
    <div class="row">
        <div class="col-sm-4 col-sm-offset-4">
            <form action="/login" method="POST">
            <div class="form-group">
                @csrf
                <labe for="exampleInputEmail">Email address</label>
                <input type="email" name="email" class="form-control" id="exampleInputEmail" placeholder="Email">
            </div>
            <div class="form-group">
                <labe for="exampleInputPassword">Password</label>
                <input type="password" name="password" class="form-control" id="exampleInputPassword" placeholder="Password">
            </div>
            <button type="submit" class="btn btn-default">Login</button>
            </form>
        </div>
    </div>
</div>

@endsection

I tried opening the login page but POST is having issues. I expected the login page to use POST to check credentials in my database.

via Chebli Mohamed