From the FAQ:
Where is the PhpMyAdmin login page?For security we configure the access to the different tools on port 22222, for example http://server.ip:22222/pma, you can choose a different port (0 – 65535) using the command sudo webinoly -tools-port 65535.Also, you can choose an existing site/domain in your server to access these tools: sudo webinoly -tools-site=domain.com, now you can use this domain as follows: https://domain.com:22222/pma.
Hope that helps.
Your regular donations is what keep this project moving forward. If you like Webinoly, buy me a coffee or a beer to show support.