use constructor

[Aminejohda]

[salesforce-cla[bot]]

Thanks for the contribution! Unfortunately we can't verify the commit author(s): Amine <a***@l***.com>. One possible solution is to add that email to your GitHub account. Alternatively you can change your commits to another email and force push the change. After getting your commits associated with your GitHub account, sign the Salesforce.com Contributor License Agreement and this Pull Request will be revalidated.

[salesforce-cla[bot]]

Thanks for the contribution! Before we can merge this, we need @Aminejohda to sign the Salesforce.com Contributor License Agreement.