Carbon date is empty when I run Insert statement - php

Question

I'm starin to use Carbon to manage Dates in PHP with MySQL, but I'm having problems with a simple Insert statement. To run SQL statements I'm using Medoo, this is my code to insert:
public function register($code, $fullname, $address, $phones, $email, $now){
$registration = $this->_app['medoo']->insert("customers",[
'cus_code' => $code,
'cus_fullname' => $fullname,
'cus_address' => $address,
'cus_phone_s' => $phones,
'cus_email' => $email,
'created_at' => $now
]);
return $registration;
}
And this is where I pass the value:
$code = $request->get('code');
$name = $request->get('name');
$phones = $request->get('phone_s');
$address = $request->get('address');
$email = $request->get('email');
$now = Carbon::now('America/Monterrey');
$customer_registration = $app['customer.model']->register($code, $name, $address, $phones, $email, $now);`
if($customer_registration){
$request_status = true;
}else {
$request_errors[] = "Ocurrio un error al registrar el cliente";
}
The statement returns an error and this is the output if I debug it:
INSERT INTO "customers"
("cus_code", "cus_fullname", "cus_address", "cus_phone_s", "cus_email", "created_at")
VALUES
('n20', 'notaria 20', 'lerdo 202', '1234567890', 'mail#mail.com')
As you can see, the date is missing and It doesn't make any sense because if I echo it inside my function...
public function register($code, $fullname, $address, $phones, $email, $now){
echo '<p>this is the variable now: '.$now.'</p>';
$this->_app['medoo']->debug()->insert("customers",[
'cus_code' => $code,
'cus_fullname' => $fullname,
'cus_address' => $address,
'cus_phone_s' => $phones,
'cus_email' => $email,
'created_at' => $now
]);
die();
return $registration;
}
outputs...
this is the variable now: 2017-05-14 00:52:00
INSERT INTO "customers"
("cus_code", "cus_fullname", "cus_address", "cus_phone_s", "cus_email", "created_at")
VALUES
('n20', 'notaria20', 'lerdo 202', '1234567890', 'mail#mail.com')
I changed $now for Date('Y-m-d H:m:s') and It works, but for my app I need to use Carbon.
I hope I was clear with this, I'm not so good with english, please help!

Answer 1

The answer of this question is in comments and which is not the way to post in SO so I am posting the answer here to close the question.
Here he needs to pass timestamp in SQL format as laravel's insert() doesn't affect created_at and updated_at values and needs manual efforts to add created_at values, so the correct way to pass it into insert() method manually should be:
Carbon::now('America/Monterrey')->format('Y-m-d H:m:s');
Thus the code should look like this
$now =Carbon::now('America/Monterrey')->format('Y-m-d H:m:s');
$this->_app['medoo']->debug()->insert("customers",[
'cus_code' => $code,
'cus_fullname' => $fullname,
'cus_address' => $address,
'cus_phone_s' => $phones,
'cus_email' => $email,
'created_at' => $now
]);