Как исправить ошибку connection refused при регистрации?

Здравствуйте при регистрации пользователя возникает ошибка (OperationalError at /sign- up/3 [Errno 111] Connection refused). Код прилагаю ниже. urls.py

        from django.urls import path
        from django.conf import settings
        from rest_framework.routers import DefaultRouter
        from rest_framework_simplejwt.views import TokenRefreshView, TokenVerifyView
        from .views import TemplateAPIView

        from . import views
        app_name = 'registration_App'

        router = DefaultRouter()


        urlpatterns = [
          path('token/refresh/', TokenRefreshView.as_view()),
          path('token/verify/', TokenVerifyView.as_view()),
        ]


        urlpatterns += [
        path('simple-signup/1', views.SimpleSignupView.as_view(), name='simple-signup'),
        ]


        urlpatterns += [
        path('sign-in/', views.LoginView.as_view(), name='api_login'),
        path('sign-up/3', views.SignUpView.as_view(), name='api_sign_up'),
        path('sign-up/verify/', views.VerifyEmailView.as_view(), 
        name='api_sign_up_verify'),
        path('password/reset/', views.PasswordResetView.as_view(), 
        name='api_forgot_password'),
        path('password/reset/confirm/', views.PasswordResetConfirmView.as_view(), 
        name='reset_confirm'),
        path('logout/', views.LogoutView.as_view(), name='logout'),
        ]

        urlpatterns += router.urls


        if settings.ENABLE_RENDERING:
          urlpatterns += [
          path('login/', TemplateAPIView.as_view(template_name='login.html'), 
          name='login'),
        path('email-sent/verify/', 
          TemplateAPIView.as_view(template_name='verification_sent.html'),
             name='verify_email_sent'),
        path('email-sent/reset/', 
        TemplateAPIView.as_view(template_name='reset_password_sent.html'),
             name='reset_email_sent'),
        path('password-reset/<uidb64>/<token>/',
             TemplateAPIView.as_view(template_name='reset_password_confirm.html'), 
        name='pass_reset_confirm'),
        path('verify-email/<key>/', 
        TemplateAPIView.as_view(template_name='email_verification.html'),
             name='account_verification'),
        ]


        views.py
        class SignUpView(CreateAPIView):
        permission_classes = (AllowAny,)
        serializer_class = serializers.UserSignUpSerializer

        class SimpleSignupView(View):
        template_name = 'simple-signup.html'

        def get(self, request):
           return render(request, self.template_name)

        class PasswordResetView(auth_views.PasswordResetView):
        serializer_class = serializers.PasswordResetSerializer


        class PasswordResetConfirmView(auth_views.PasswordResetConfirmView):
        serializer_class = serializers.PasswordResetConfirmSerializer


        class VerifyEmailView(_VerifyEmailView):

        def get_serializer(self, *args, **kwargs):
            return serializers.VerifyEmailSerializer(*args, **kwargs)


        Вот setting.py
        EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
        EMAIL_HOST = os.environ.get('EMAIL_HOST', 'smtp.gmail.com')
        EMAIL_PORT = int(environ.get("EMAIL_PORT", 465))
        EMAIL_HOST_USER = environ.get('EMAIL_HOST_USER', 'ioann.basic@gmail.com')
        EMAIL_HOST_PASSWORD = environ.get('EMAIL_HOST_PASSWORD', '19951383ok')
        DEFAULT_FROM_EMAIL = environ.get('DEFAULT_FROM_EMAIL', 'ioann.basic@gmail.com')
        EMAIL_TIMEOUT = int(environ.get('EMAIL_TIMEOUT', 15))
        EMAIL_USE_SSL = int(environ.get('EMAIL_USE_SSL', 1))
        EMAIL_USE_TLS = int(environ.get('EMAIL_USE_TLS', 0))

        ALLOWED_HOSTS: list = os.environ.get("DJANGO_ALLOWED_HOSTS", 
        'localhost,127.0.0.1').split(",")
        FRONTEND_SITE = 'http://localhost:8000'
        ENABLE_RENDERING = int(os.environ.get('ENABLE_RENDERING', 1))

        SUPERUSER_EMAIL = os.environ.get('SUPERUSER_EMAIL', 'admin@gmail.com')
        SUPERUSER_PASSWORD = os.environ.get('SUPERUSER_PASSWORD', '1524ok')

        DEBUG = int(os.environ.get("DEBUG", default=1))

        # noinspection PyRedeclaration
        ALLOWED_HOSTS: list = os.environ.get("DJANGO_ALLOWED_HOSTS", 
       'localhost,127.0.0.1').split(",")

        signup.js
        $(function () {
        $('#signUpForm').submit(singUp);
        });

        const error_class_name = "has-error"

        function singUp(e) {
        let form = $(this);
        e.preventDefault();
        $.ajax({
           url: form.attr("action"),
           type: form.attr("method"),
           dataType: 'json',
           data: form.serialize(),
           success: function (data) {
           window.location.href = form.data('href');
        },
        error: function (data) {
        error_process(data);
        }
        })
        }



        const error_class_name = "has-error"



        function error_process(data) {
        $(".help-block").remove()
        let groups = ['#firstNameGroup', '#lastNameGroup', '#usernameGroup', 
        '#emailGroup',  '#passwordGroup']
        for (let group of groups) {
        $(group).removeClass(error_class_name)
        };
        var element = document.getElementById('first_name');
        var html = element.outerHTML;
        var data = { html: html };
        var json = JSON.stringify(data);
        if (data.responseJSON.element) {
        help_block("#fistNameGroup", data.responseJSON.element)
        }
        var melement = document.getElementById('last_name');
        var html = melement.outerHTML;
        var data = { html: html };
        var json = JSON.stringify(data);
        if (data.responseJSON.melement) {
        help_block("#lastNameGroup", data.responseJSON.melement)
        }
        var nelement = document.getElementById('username');
        var html = nelement.outerHTML;
        var data = { html: html };
        var json = JSON.stringify(data);

        if (data.responseJSON.nelement) {
        help_block("#usernameGroup", data.responseJSON.nelement)
        }
        var zelement = document.getElementById('email');
        var html = zelement.outerHTML;
        var data = { html: html };
        var json = JSON.stringify(data);
        if (data.responseJSON.zelement) {
        help_block("#email", data.responseJSON.zelement)
        }
        var lelement = document.getElementById('password');
        var html = lelement.outerHTML;
        var data = { html: html };
        var json = JSON.stringify(data);
        if (data.responseJSON.lelement) {
        help_block("#password", data.responseJSON.lelement)
        }
        }

        function help_block(group, variable) {
        $(group).addClass(error_class_name);
        $(group).append('<div class="help-block">' + variable + "</div>");
        }

        Форма в html
        <form id="signUpForm" action="{% url 'registration_App:api_sign_up' %}" 
        role="form" method="post" class="form" data-href="{% url 
        'registration_App:verify_email_sent' %}"
         >
                        {% csrf_token %}
                    <div class="row" data-visible="desktop">
                        <div class="col-md-6">
                            <div class="signup__section" id="firstNameGroup">
                                <input type="text" name="first_name" value="" 
         class="form-control input-lg"  placeholder="First Name"
                                       required />

                            </div>
                        </div>
                        <div class="col-md-6">
                            <div class="signup__section" id="lastNameGroup">
                                <input type="text" name="last_name" value="" class="form- 
         control input-lg"   placeholder="Last Name"
                                       required />


                            </div>
                        </div>
                    </div>
                    <div class="signup__section" id="usernameGroup">
                        <input type="text" name="username" value="" class="form-control 
        input-lg"  placeholder="User Name"
                               required />

                    </div>
                    <div class="signup__section" id="emailGroup">
                        <input type="text" name="email" value="" class="form-control 
        input-lg"  placeholder="Email"
                               required />
                    </div>
                    <div class="signup__section" id="passwordGroup">
                        <div class="message-input">
                            <input type="password" name="password"  value="" class="form- 
        control input-lg"
                                   placeholder="Password" required />
                            <span class="message-input__strong">strong</span>
                        </div>
                    </div>
                    <div class="signup__checkbox">
                        <div class="row">
                            <div class="col-md-6">
                                <label class="signup__box">
                                    <label class="custom-checkbox">
                                        <input type="checkbox" checked="checked">
                                        <i></i>
                                    </label>
                                    <span>I agree to the Terms & Conditions.</span>
                                </label>
                            </div>
                            <div class="col-md-6" data-visible="desktop">
                                <label class="signup__box">
                                    <label class="custom-checkbox">
                                        <input type="checkbox">
                                        <i></i>
                                    </label>
                                    <span>Subscribe to newsletter</span>
                                </label>
                            </div>
                        </div>
                    </div>
                    <button class="signup__btn-create btn btn--type-02" 
         type="submit">Create New Account</button>
                  </form>        
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