Added the ability to add roles to members

cogs/roles.py

@@ -18,13 +18,13 @@ class Roles:
 
     @role.command(name='add', pass_context=True)
     @checks.customPermsOrRole(manage_server=True)
-    async def add_role(self, ctx, *, members: discord.Member = None):
+    async def add_role(self, ctx):
         """Use this to add a role to multiple members.
         Provide the list of members, and I'll ask for the role
         If no members are provided, I'll first ask for them"""
         server_roles = [role for role in ctx.message.server.roles if not role.is_everyone]
-
-        if members is None:
+        members = ctx.message.mentions
+        if len(members) == 0:
             await self.bot.say("Please provide the list of members you want to add a role to")
             msg = await self.bot.wait_for_message(author=ctx.message.author, channel=ctx.message.channel)
             if msg is None: