Helpers can’t mention others in reminders
Helpers (and partners/python community) should be able to mention other users, but not roles, in reminders. In late June, this was still possible, but it currently isn't.

While looking through the source code and git blame (looks *calmly* at @TizzySaurus), I think I managed to locate the issue to the `Reminders._check_mentions` method. For a non-mod helper, the error message when mentioning another user in a reminder (should be allowed), is the error message that should be used when trying to mention a role (defined at https://github.com/python-discord/bot/blob/06e90af5e19d9dd83ae44ac2ae0eb3eeb43349e2/bot/exts/utils/reminders.py#L120).

It basically seems like the user is getting blocked due to not being a moderator, while they should be allowed to mention others. If someone could look at this a bit more extensively than I did today, and fix it, that would be much appreciated 😄
diff --git a/bot/exts/utils/reminders.py b/bot/exts/utils/reminders.py
index be518129..b4f88af0 100644
--- a/bot/exts/utils/reminders.py
+++ b/bot/exts/utils/reminders.py
@@ -118,7 +118,7 @@ class Reminders(Cog):
         if await has_no_roles_check(ctx, *STAFF_PARTNERS_COMMUNITY_ROLES):
             return False, "members/roles"
         elif await has_no_roles_check(ctx, *MODERATION_ROLES):
-            return all(isinstance(mention, discord.Member) for mention in mentions), "roles"
+            return all(isinstance(mention, (discord.User, discord.Member)) for mention in mentions), "roles"
         else:
             return True, ""
 
['bot/exts/utils/reminders.py']