[Fixed]-"next" is not redirecting to expected position

I’m not sure it how it even manages to get to the account page since you’re using the render tag as a mixture of render and redirect.

return render(request, '/add_money/')

You should return a redirect response back to the next url instead

return HttpResponseRedirect(request.GET['next'])

Also, you’re passing the next to the login template, not the url

if not request.user.is_authenticated():
        return render(request, 'registration/login.html', {"next": '/add_money/'})

you should redirect to the login page here as well with next as a get parameter

    return  HttpResponseRedirect('/login/?next={}'.format('/add_money/')

_{You should also look into using the provided url reversing methods instead of hard coding urls}

You also should remove the whole if next in the template and just let the login action be the default for the page

{% if next %}
    <form action="/login/?next={{next}}" method="post">
        <input type="hidden" name="next" value={{ next }}>
{%else%}
    <form action="/login/" method="post" >
{% endif %}

should be

<form method="post" >