async def addblacklist(message):
    isadmin0 = await isadmin(message.author)
    if isadmin0 == True:
        arguments = message.content.split()
        target = discord.utils.find(lambda m: m.mention == arguments[1], message.channel.server.members)
        isblacklisted = await isblacklist(target)
        if isblacklisted == False:
            connection = await aiomysql.connect(host=str(mysql_host),user=str(mysql_user),password=str(mysql_passwd), db=str(mysql_db), charset='utf8mb4')
            async with connection.cursor(aiomysql.cursors.DictCursor) as cur:
                sql = "INSERT INTO `blacklist` (`discordid`) VALUES ('" + target.id + "');"
                await cur.execute(sql)
                await connection.commit()
                connection.close()
                await client.send_message(message.channel, str(target) + " est maintenant blacklisté")
                return
        else:
            embed=discord.Embed(title="Blacklist", description=str(target) + " est deja blacklisté", color=0xff0000)
            await client.send_message(message.channel, embed=embed)
            return