feat: add portal allauth account flow

apps/portal/views.py

@@ -1,3 +1,13 @@
-from django.shortcuts import render
+from django.contrib.auth.mixins import LoginRequiredMixin
+from django.views.generic import TemplateView
 
-# Create your views here.
+from apps.billing.services import get_balance_snapshot
+
+
+class DashboardView(LoginRequiredMixin, TemplateView):
+    template_name = "portal/dashboard.html"
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context["balance"] = get_balance_snapshot(self.request.user)
+        return context