Add message if verification not enabled

jarvis/cogs/verify.py

@@ -44,6 +44,11 @@ class VerifyCog(commands.Cog):
         role = self.db.jarvis.settings.find_one(
             {"setting": "verified", "guild": ctx.guild.id}
         )
+        if not role:
+            await ctx.send(
+                "This guild has not enabled verification", delete_after=5
+            )
+            return
         if ctx.guild.get_role(role["value"]) in ctx.author.roles:
             await ctx.send("You are already verified.", delete_after=5)
             return