Restrict groups command

bot.py

@@ -350,6 +350,8 @@ async def quote_remove_command(ctx: commands.Context, author: str, quote: str):
 @bot.command(name='groups', brief="Manage groups")
 async def group_command(ctx: commands.Context, subcommand: Optional[str], arg: Optional[str],
                         members: commands.Greedy[discord.Member]):
+    if not ctx.author.guild_permissions.manage_roles:
+        await ctx.send("Access denied!")
     if subcommand is None:
         await ctx.send("Available commands: `list`, `create`, `archive`")
         return