问我的代码不工作-表单未提交

EN

<!-- The form markup -->
<div class="modal fade" id="exampleModal" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true">
    <div class="modal-dialog modal-dialog-centered">
        <div class="modal-content">
            <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
            <div>
                <h1 class="text-primary fw-bold text-center log-in-title">Log In</h1>
            </div>

            <div class="mt-3 text-center">
                <!-- The form -->
                <form class="mod-auth">
                    <div class="mb-3">
                        <input id="mod-auth-username" type="text" placeholder="Username" name="username" class="form-control" required>
                    </div>
                    <div class="mb-3">
                        <input id="mod-auth-password" type="password" placeholder="Password" name="password" class="form-control" required>
                     </div>
                    <div class="d-grid gap-2 mx-auto">
                        <button class="btn btn-primary" type="button">Log in</button>
                    </div>
                </form>
                <hr>
                <h6>Don't have an account? <a href="/sign-up/?next={{request.path}}">Sign up</a></h6>
            </div>
        </div>

    </div>
</div>

// AJAX Post request
$(document).on('submit', '.mod-auth', (e) => {
    e.preventDefault();
    console.log('hi');
    $.ajax({
        url: '/log-in/',
        type: 'POST',
        data: {
            csrfmiddlewaretoken: $('input[name=csrfmiddlewaretoken]').val(),
            username: $('#mod-auth-username').val(),
            password: $('#mod-auth-password').val(),
        },
        success: function() {},
    });
});

# views.py
# This method already handles a log in page and the AJAX post request code given above sends request here.
def log_in(request):
    if request.user.is_authenticated:
        return redirect('/')

    if request.method == 'POST':
        username = request.POST.get('username', '')
        password = request.POST.get('password', '')

        user = authenticate(username=username, password=password)
        if user is not None:
            login(request, user)
            if request.POST.get('next', ''):
                return redirect(f"{request.POST.get('next', '')}")
            return redirect(f"/{username}/")
        else:
            messages.error(request, 'Either the username or password is wrong! Note that your password and username are case sensitive')
            return redirect(f'{request.path}?next={request.POST.get("next", "")}')

    return render(request, 'log_in.html')