Fix quick code smell.

cogs/commands/create.py

@@ -97,10 +97,9 @@ class CreateCog(commands.Cog, name="Create Cog"):
             min_value=1,
             max_value=30,
         ),
-        channel: nextcord.abc.GuildChannel | None = nextcord.SlashOption(
+        channel: nextcord.TextChannel | None = nextcord.SlashOption(
             description="Channel to post Group in. If left empty, defaults to current channel.",
             required=False,
-            channel_types=[nextcord.ChannelType.text],
             default=None,
         ),
     ) -> None:
@@ -119,11 +118,13 @@ class CreateCog(commands.Cog, name="Create Cog"):
         """
         # if no channel provided, use current channel.
         if channel is None:
-            channel = interaction.channel
+            channel_id: int = interaction.channel.id
+        else:
+            channel_id: int = channel.id
 
         new_group = CategoryGroup(
             GroupName=group_name,
-            ChannelId=channel.id,
+            ChannelId=channel_id,
             GuildId=interaction.guild_id,
             PadLength=pad_length,
             UsernameLength=username_length,