News: Pass chanel by string id

Uh discord why? Apparently you can't pass announcements channel as arg

hrochobot/cogs/news.py

@@ -76,10 +76,18 @@ class News(commands.Cog):
     )
 
     @news.command(description="Adds a new secret role.")
-    @discord.option("channel", discord.TextChannel, description="Channel for sending news.")
-    async def set_channel(self, ctx, channel: discord.TextChannel):
+    @discord.option("channel_id", str, description="Id of the channel for sending news.")
+    async def set_channel(self, ctx, channel_id: str):
+        try:
+            channel_id = int(channel_id)
+        except ValueError:
+            return await ctx.respond(f"Channel id must be int.", ephemeral=True)
+
+        if not (channel := get(ctx.guild.channels, id=channel_id)):
+            return await ctx.respond(f"No channel with id ``{channel_id}``.", ephemeral=True)
+
         news_json = data.load_guild_data(ctx.guild.id, NEWS_JSON)
-        news_json["news_channel"] = channel.id
+        news_json["news_channel"] = channel_id
         data.dump_guild_data(ctx.guild.id, NEWS_JSON, news_json)
         return await ctx.respond(f"News channel set to {channel.mention}.", ephemeral=True)