Tech Junkie

Please take your hostility somewhere else, that is your opinion  and that comes from your view of the world. If you want to use it, use it, if you do not fine by me.

Considering this is your first post this reaks of SEO manipulation

I recently read an article published by a company called Simius on How to Prevent your smart home from being Hacked. I read about it and actually used their product to scan my network and it should a password breach and I had to update my firmware. I want my home smart home experience and still feel safe because i cannot be connecting them to a vlan for the sake of security when I to check in on my loved ones remotely while I am away.
How to Prevent your Smart Home from being Hacked – An Expert Opinion. | Simius AI

Keep your account for future use, or have it deleted by Control4 if not.
 
If you want Contol4 in any new place, that HE license is good for life, but you must keep the same account.
 
As for what to give the new owner, a dealer will have to register the system, so I would unregister it from your account after logging out of all the personal streaming services.
No info is required to transfer from the old owner to the new owner. The dealer can register the system to a new account as long as the system is unregistered.

Log out of all your personal streaming accounts.
Your dealer or a dealer should be able to work with the new owner to transfer the registration to a new account.
Composer HE license is tied to your account, but it is not recommended to give that account to the new home owner as it will not be a clean slate on the Control4 cloud-side.

Honestly, 'they' don't need anything. You log out of things like SiriusXM/Deezer etc etc from any interface. Unregister controller is done from customer.control4.com, though frankly, the moment the controller gets registered to a new account, your connection to it is dead, so unregister of the system is optional (though not the services for music)

Just to note for future readers (doesn't affect OP as it's EA series controllers) - IF you have an older controller running the system (older HC800/250 (non bl-1 versions) or older still, there COULD be an issue when selling your system in that there might be a app license on the system (as in to use the C4 mobile app) that would be LOST if you're registering to a new account - this could cause some issues.
 
As time progresses, this becomes less of an issue, but wanted to note it

Your dealer could have set a password on the project

Have you tried tour WiFi password? If your dealer setup your WiFi also, he may have used the same password for both.

Network Reset Instructions 1 - Unplug power
2 - Hold down Link\ID\Identify button
3 - Continue to hold down the button and plug in the power
4 - Hold link\ID button until Data and Link lights come on solid together (they will only be in this state for a couple of seconds). Let go before those lights turn off.
Note: In OS 2.10.1 and lower, the Caution LED appears solid blue during the network reset check. After updating to OS 2.10.2 and higher, the Caution LED appears orange during the network reset check.
Note: Performing a Network Reset on the controller running Director will also reset the password on the controller

I won't charge $1000 for this.  Special price today.  $999

Don't tell anybody

Thanks, I tried that. No luck.  After a few weeks...Local Dealer says they didn't do anything.
And then he told me "Sorry you can't access your system. Reset your password at control4.com"
WTF kind of advice is that? I can access my C4 user web account just fine. And I tried the password. Doesn't work.
This is my big mistake with this system choice--yeah it's much more reliable and robust than DIY...but when it does break or I want to make a change, I am at the mercy of a dealer.  They can charge me $1000 if they wanted to for a truck roll, and what could I do?  Heck they charged a few hundred dollars to replace an NVR that was under warranty.
Yes I realize there are remote dealer arrangements and I had a great experience with that so far. People here are awesome. But this is a forum, not a support arrangement. It is done by dealers with integrity because they know how screwed up the whole arrangement can be with some dealer and customer combinations. When stuff is under warranty remote support isn't always the right choice for various reasons.  
And nor is that much of a warranty from the place I bought it from who can determine what a 1 year or 3 year warranty means. Cannot say I'd ever recommend it again because of this reason. But props to the folks here--you are all a bright spot in the arrangement.