@bot.command()
async def check_members(ctx):
    r = []
    for guild in bot.guilds:
        for member in guild.members:
            r.append(member)
    print(r)

 @bot.command()
async def check_members(ctx):
    r = []
    for guild in bot.guilds:
        for member in guild.members:
            r.append(guild.get_member(member))
    print(r)