Discord Bot not working

[SoulWolfX]

For some reason once I added a music function to my discord bot it stopped working, can anyone tell me why? My code is;

# FangBot by SoulWolfX#1057 https://www.youtube.com/c/SoulWolfGamer for wolfnation

startup_extensions = ["Music"]
bot = commands.Bot(command_prefix='-')



@bot.event
async def on_ready():
    print ("FangBot innitialized. hello wolfnation")

class Main_Commands ():
    def __init__ (self, bot):
self.bot = bot

@client.event
async def wait_until_login():
    await client.change_presence(game=discord.Game(name='WolfNation bot made by http://bit.ly/2EzoA8e'))
@bot.command(pass_context=True)

async def ping(ctx):
    await bot.say(":ping_pong: Pong")
    print ("user has pinged")
    

    
    async def pong(ctx):
    await bot.say(":ping_pong: Ping")
    print ("user has ponged")




@client.command(pass_context=True)
    async def yt(ctx):
        url = ctx.message.content
        url = url.strip('!yt ')

        author = ctx.message.author
        voice_channel = author.voice_channel
        vc = await client.join_voice_channel(voice_channel)

        player = await vc.create_ytdl_player(url)
        player.start()



@bot.command(pass_context=True)
async def info(ctx, user: discord.Member):
    await bot.say("The users name is (and no its not john cena): {}".format(user.name))
    await bot.say("The users ID is: {}".format(user.id))
    await bot.say("The users status is: {}".format(user.status))
    await bot.say("The users rank is: {}".format(user.top_role))
    await bot.say("The user joined at: {}".format(user.joined_at))

@bot.command(pass_context=True)
async def kick(ctx, user: discord.Member):
    await bot.say(":boot: Cya, {}. don't wanna be ya.".format(user.name))
    await bot.kick(user)
@bot.command(pass_context=True)
async def ban(ctx, user: discord.Member):
    await bot.say(":hammer: Dirty cheater {}. FACE THORS MIGHTY BAN HAMMER!".format(user.name))
    await bot.ban(user)


if __name__ == "__main__":
    for extension in startup_extension(extension)
    except Exception as e:
        exc = '{}: {}'.format(type(e).__name__, e)
        print('Failed to load extension {}\n{}'.format(extension, exc))


    
    await client.change_presence(game=discord.Game(name="WolfNation bot made by http://bit.ly/2EzoA8e"))

bot.run("PLACEHOlDER SO NO ONE STEALS MY BOT TOKEN")