Add SSLContext arg to aiohttp adapter (#483)

* Add SSLContext arg to aiohttp adapter

Pass an SSLContext to the aiohttp adapter to create a valid SSL endpoint for OAuth callback.

* Update docs for aiohttp adapter

* Added ssl import to pass linter checks

* Moved import to TYPE_CHECKING

Moved the ssl import to TYPE_CHECKING section.

* Removed trailing whitespace

* Fix import format issue from Ruff

twitchio/web/aio_adapter.py

@@ -43,6 +43,8 @@
 
 
 if TYPE_CHECKING:
+    from ssl import SSLContext
+
     from ..authentication import AuthorizationURLPayload, UserTokenPayload
     from ..client import Client
 
@@ -101,6 +103,8 @@ class AiohttpAdapter(BaseAdapter, web.Application):
         An optional :class:`str` passed to use as the EventSub secret. It is recommended you pass this parameter when using
         an adapter for EventSub, as it will reset upon restarting otherwise. You can generate token safe secrets with the
         :mod:`secrets` module.
+    ssl_context: SSLContext | None
+        An optional :class:`SSLContext` passed to the adapter. If SSL is setup via a front-facing web server such as NGINX, you should leave this as None.
 
     Examples
     --------
@@ -139,6 +143,7 @@ def __init__(
         domain: str | None = None,
         eventsub_path: str | None = None,
         eventsub_secret: str | None = None,
+        ssl_context: SSLContext | None = None,
     ) -> None:
         super().__init__()
         self._runner: web.AppRunner | None = None
@@ -160,6 +165,8 @@ def __init__(
         path: str = eventsub_path.removeprefix("/").removesuffix("/") if eventsub_path else "callback"
         self._eventsub_path: str = f"/{path}"
 
+        self._ssl_context: SSLContext | None = ssl_context
+
         self._runner_task: asyncio.Task[None] | None = None
         self.startup = self.event_startup
         self.shutdown = self.event_shutdown
@@ -210,7 +217,7 @@ async def run(self, host: str | None = None, port: int | None = None) -> None:
         self._runner = web.AppRunner(self, access_log=None, handle_signals=True)
         await self._runner.setup()
 
-        site: web.TCPSite = web.TCPSite(self._runner, host or self._host, port or self._port)
+        site: web.TCPSite = web.TCPSite(self._runner, host or self._host, port or self._port, ssl_context=self._ssl_context)
         self._runner_task = asyncio.create_task(site.start(), name=f"twitchio-web-adapter:{self.__class__.__qualname__}")
 
     async def eventsub_callback(self, request: web.Request) -> web.Response: