Refactor Plex interaction into separate module

app/utils/plex_client.py

@@ -0,0 +1,16 @@
+from plexapi.myplex import MyPlexAccount
+from plexapi.server import PlexServer
+
+
+def connect_plex(config, username, password, url, port, library):
+    """Return a connected PlexServer instance and update config with token and server info."""
+    token = config.get("token")
+    if not token:
+        account = MyPlexAccount(username, password)
+        token = account.authenticationToken
+        config["token"] = token
+
+    base_url = f"http://{url}:{port}"
+    server = PlexServer(base_url, token)
+    config.update({"server_url": url, "server_port": port, "library": library})
+    return server