Fix typing in getex command (#2088)

Andrew-Chen-Wang · web-flow · commit e5e265de87df · 2022-04-18T11:35:59.000+03:00
diff --git a/redis/commands/core.py b/redis/commands/core.py
@@ -256,7 +256,7 @@ def acl_setuser(
         For more information see https://redis.io/commands/acl-setuser
         """
         encoder = self.get_encoder()
-        pieces: list[str | bytes] = [username]
+        pieces: List[EncodableT] = [username]
 
         if reset:
             pieces.append(b"reset")
