Node JS Discord Log guildMemberUpdate - node.js

Question

I have tried various things and there are no errors but my bot has no response I tried to change my nickname, avatar, etc. there is no response here I am using node js please help me following my sample code. but when I attempt to carry it over to role adding and deletion, usernames, nicknames, and avatar changes, the bot fails to log this and crashes. How do I fix this issue within my code?
//declare changes
var Changes = {
unknown: 0,
addedRole: 1,
removedRole: 2,
username: 3,
nickname: 4,
avatar: 5
};
var change = Changes.unknown;
//check if roles were removed
var removedRole = '';
oldMember.roles.every(function(value) {
if(newMember.roles.find('id', value.id) == null) {
change = Changes.removedRole;
removedRole = value.name;
}
});
//check if roles were added
var addedRole = '';
newMember.roles.every(function(value) {
if(oldMember.roles.find('id', value.id) == null) {
change = Changes.addedRole;
addedRole = value.name;
}
});
//check if username changed
if(newMember.user.username != oldMember.user.username)
change = Changes.username;
//check if nickname changed
if(newMember.nickname != oldMember.nickname)
change = Changes.nickname;
//check if avatar changed
if(newMember.user.displayAvatarURL != oldMember.user.displayAvatarURL)
change = Changes.avatar;
//post in the guild's log channel
var log = newMember.guild.channels.cache.get("channelID")
if (log != null) {
switch(change) {
case Changes.unknown:
log.send('**[User Update]** ' + newMember);
break;
case Changes.addedRole:
log.send('**[User Role Added]** ' + newMember + ': ' + addedRole);
break;
case Changes.removedRole:
log.send('**[User Role Removed]** ' + newMember + ': ' + removedRole);
break;
case Changes.username:
log.send('**[User Username Changed]** ' + newMember + ': Username changed from ' +
oldMember.user.username + '#' + oldMember.user.discriminator + ' to ' +
newMember.user.username + '#' + newMember.user.discriminator);
break;
case Changes.nickname:
log.send('**[User Nickname Changed]** ' + newMember + ': ' +
(oldMember.nickname != null ? 'Changed nickname from ' + oldMember.nickname +
+ newMember.nickname : 'Set nickname') + ' to ' +
(newMember.nickname != null ? newMember.nickname + '.' : 'original username.'));
break;
case Changes.avatar:
log.send('**[User Avatar Changed]** ' + newMember);
break;
}
}
})