Step 1: Extract the file according to the specific PHP version you are using.
Step 2: After extracting files upload the folder hetzner in path: eg. /whmcs root directory/modules/servers/
Step 3: Procedure to activate the license:
Please find the modules Hetzner folder in (eg. /public_html/whmcs/modules/servers/hetzner) & then rename the file license_key_file.php, now rename it to license_key_file.php, now you need to open the file and enter the License key in variable $license_key, eg. $license_key =''leased-ABCDXZ123";
Step 4: Login to admin area -> Setup -> Products/Services->Products/Services & then create a new product group eg. Hetzner Product Group.
Step 5: Create a product eg. Test Pro Beta & assign it to Hetzner Provisioning Module.
Step 6: Enter the API Token & Other Config Options fields according to your choice.
Step 7: Set pricing and other fields in the pricing tab and other required fields etc... and then click on save.
Step 8: Order product from Client Area or Admin area.
Step 9: Go to the orders tab and select your order and make the order active .
Step 10: Click on Items links eg VPS/Server open Products/Services tab of the client. Click Create Button for server creations action.