Tying your module to your Addons account
In order to tie your module to you Addons account, you simply need to add your Addons key to the module's constructor:
public function __construct()
{
$this->name = 'mymodule';
$this->tab = 'front_office_features';
$this->version = '1.0.0';
$this->author = 'Firstname Lastname';
$this->need_instance = 0;
$this->ps_versions_compliancy = array('min' => '1.6', 'max' => _PS_VERSION_);
$this->bootstrap = true;
$this->module_key = '084fe8aecafea8b2f84cca493377eb9b';
(...)
The module_key can be found in the download page for the module.