Fixed read prefix

First iteration work with cog from slash command

cogs/first_cog.py

@@ -0,0 +1,20 @@
+import logging
+
+from discord.ext import commands
+
+
+class Test_Cog(commands.Cog):
+    def __init__(self, bot):
+        self.bot = bot  # defining bot as global var in class
+
+    @commands.Cog.listener()  # this is a decorator for events/listeners
+    async def on_ready(self):
+        logging.info(f'Cog {__name__.split(".")[1]} is ready!.')
+
+    @commands.command()  # this is for making a command
+    async def ping(self, ctx):
+        await ctx.send(f'Pong! {round(self.bot.latency * 1000)}')
+
+
+def setup(bot):  # a extension must have a setup function
+    bot.add_cog(Test_Cog(bot))  # adding a cog