fix: 🐛 Fix None default role in user installed apps. (#2650)

* 🐛 Fix `None` default role in user installed apps.

* 📝 CHANGELOG.md

* style(pre-commit): auto fixes from pre-commit.com hooks

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -60,6 +60,8 @@ These changes are available on the `master` branch, but have not yet been releas
   ([#2627](https://github.com/Pycord-Development/pycord/issues/2627))
 - Fixed `AttributeError` when sending polls with `PartialWebook`.
   ([#2624](https://github.com/Pycord-Development/pycord/pull/2624))
+- Fixed `AttributeError` when accessing `Member.guild_permissions` for user installed
+  apps. ([#2650](https://github.com/Pycord-Development/pycord/pull/2650))
 
 ### Changed
 

discord/member.py

@@ -566,7 +566,8 @@ def roles(self) -> list[Role]:
             role = g.get_role(role_id)
             if role:
                 result.append(role)
-        result.append(g.default_role)
+        if g.default_role:
+            result.append(g.default_role)
         result.sort()
         return result