Refactor test utilities and enhance ASGI settings

- Cleaned up and standardized assertions in ApiTestMixin for API response validation.
- Updated ASGI settings to use os.environ for setting the DJANGO_SETTINGS_MODULE.
- Removed unused imports and improved formatting in settings.py.
- Refactored URL patterns in urls.py for better readability and organization.
- Enhanced view functions in views.py for consistency and clarity.
- Added .flake8 configuration for linting and style enforcement.
- Introduced type stubs for django-environ to improve type checking with Pylance.

accounts/adapters.py

@@ -18,7 +18,7 @@ class CustomAccountAdapter(DefaultAccountAdapter):
         """
         Constructs the email confirmation (activation) url.
         """
-        site = get_current_site(request)
+        get_current_site(request)
         return f"{settings.LOGIN_REDIRECT_URL}verify-email?key={emailconfirmation.key}"
 
     def send_confirmation_mail(self, request, emailconfirmation, signup):
@@ -26,20 +26,18 @@ class CustomAccountAdapter(DefaultAccountAdapter):
         Sends the confirmation email.
         """
         current_site = get_current_site(request)
-        activate_url = self.get_email_confirmation_url(
-            request, emailconfirmation)
+        activate_url = self.get_email_confirmation_url(request, emailconfirmation)
         ctx = {
-            'user': emailconfirmation.email_address.user,
-            'activate_url': activate_url,
-            'current_site': current_site,
-            'key': emailconfirmation.key,
+            "user": emailconfirmation.email_address.user,
+            "activate_url": activate_url,
+            "current_site": current_site,
+            "key": emailconfirmation.key,
         }
         if signup:
-            email_template = 'account/email/email_confirmation_signup'
+            email_template = "account/email/email_confirmation_signup"
         else:
-            email_template = 'account/email/email_confirmation'
-        self.send_mail(
-            email_template, emailconfirmation.email_address.email, ctx)
+            email_template = "account/email/email_confirmation"
+        self.send_mail(email_template, emailconfirmation.email_address.email, ctx)
 
 
 class CustomSocialAccountAdapter(DefaultSocialAccountAdapter):
@@ -54,7 +52,7 @@ class CustomSocialAccountAdapter(DefaultSocialAccountAdapter):
         Hook that can be used to further populate the user instance.
         """
         user = super().populate_user(request, sociallogin, data)
-        if sociallogin.account.provider == 'discord':
+        if sociallogin.account.provider == "discord":
             user.discord_id = sociallogin.account.uid
         return user