500 Internal Server Error Laravel API

My Login controller end point is showing 500 status code, when trying to login a user and also the register is also showing 500 when trying to register a new user. But it used to work before and i had a token for a user but when i try to login it shows 500. pls what could be the problem. When i use GET method to access my profile with Bearer Token of the user it throws a 401 status code error with message '' "message": "Unauthenticated."''. Pls i don't seem to know the challenge

Login Controller

class LoginController extends Controller
{
    public function __invoke(Request $request)
    {
        $request->validate([
            'email' => ['required', 'email'],
            'password' => ['required'],
        ]);


        $user = User::where('email', $request->email)->first();

        if ( ! $user || ! Hash::check ($request->password, $user->password)) {
            
            throw ValidationException::withMessages([
                'email' => ['The provided credentials are incorrect.'],
            ]);
        }

        $device = substr($request->userAgent() ?? '', 0, 255);
        $expiresAt = $request->remember ? null : now()->addMinutes(config('session.lifetime'));
 
        return response()->json([
            'access_token' => $user->createToken($device, expiresAt: $expiresAt)->plainTextToken,
        ], Response::HTTP_CREATED);

        // 
    }

Register Controller

class RegisterController extends Controller
{
    public function __invoke(Request $request)
    {
        $request->validate([
            'name' => ['required', 'string', 'max:255'],
            'email' => ['required', 'string', 'email', 'max:255', 'unique:users'],
            'password' => ['required', 'confirmed', Password::defaults()],
        ]);


        $user = User::create([
            'name' => $request->name,
            'email' => $request->email,
            'password' => Hash::make($request->password),
        ]);

        event(new Registered($user));

        $device = substr($request->userAgent() ?? '', 0, 255);

        return response()->json([
            'access_token' => $user->createToken($device)->plainTextToken,
        ], Response::HTTP_CREATED);
    }
}   

Profile Controller

class ProfileController extends Controller
{
    public function show(Request $request)
    {
        return response()->json($request->user()->only('name', 'email'));
    }


    public function update(Request $request){

        $validatedData = $request->validate([

            'name' => ['required', 'string'],
            'email' => ['required', 'email', Rule::unique('users')->ignore(auth()->user())],
        ]);

        auth()->user()->update($validatedData);
 
        return response()->json($validatedData, Response::HTTP_ACCEPTED);
    }
}

API Route

Route::middleware('auth:sanctum')->get('/user', function (Request $request) {
    return $request->user();
});

Route::post('auth/register', [Auth\RegisterController::class]);
Route::post('auth/login', [Auth\LoginController::class]);

Route::middleware('auth:sanctum')->group(function () {
    Route::get('profile', [Auth\ProfileController::class, 'show']);
    Route::put('profile', [Auth\ProfileController::class, 'update']);
});