discord.py Юзер отображается как NoneType

@client.event
async def on_raw_reaction_add(payload):
    global ticketNumber
    server = await client.fetch_guild(payload.guild_id)

    emoji = str(payload.emoji)
    channel = client.get_channel(payload.channel_id)
    message = await channel.fetch_message(payload.message_id)
    author = message.author
    user = utils.get(message.guild.members, id=payload.user_id)
    ticket = "ticket-"+ str(ticketNumber)

    overwrites = {
        server.default_role: discord.PermissionOverwrite(read_messages=False),
        user: discord.PermissionOverwrite(read_messages=True)
    }

    await server.create_text_channel(ticket, category=Tickets2b,overwrites=overwrites)