Cannot read property 'members' of undefined

[JohnYuZhang]

I want to retreive a member status of a specific member through:

var bot = new Discord.Client({
   token: auth.token,
   autorun: true
});
bot.on('ready', function (evt) {
    logger.info('Connected');
    logger.info('Logged in as: ');
    logger.info(bot.username + ' - (' + bot.id + ')');
    console.log(bot.servers[data.serverID].members[data.userID].status)
});

(assuming this is now you get the server id)

but it says the members object is undefined.

I've also tried:
bot.getMember(data,function(err,res){console.log(err)} ) which returns an unauthorized error.
name: 'ResponseError',
statusCode: 401,
statusMessage: 'UNAUTHORIZED',
response: { code: 0, message: '401: Unauthorized' } }

The example files on message and presence work fine without any authorization errors.