Connect three dashboards users into one

I have a website: www.appoinda.com

Made based on this code: https://codecanyon.net/item/aoxio-saas-multibusiness-service-booking-software/33026229?_ga=2.78568788.1514548670.1669628839-1569919106.1655970880



The website is online booking SaaS tool, there are 4 levels of users: Super admin, admin, staff, customer.



I want to add features:

1- Event Booking, by using this code in subdomain: https://codecanyon.net/item/startevent-create-your-own-events-sell-tickets-saas/34624172?sso=1&_ga=2.174912098.1514548670.1669628839-1569919106.1655970880



2- Video conference: by using this code in subdomain: https://codecanyon.net/item/jupitermeet-pro-video-conference/37367339?sso=1&_ga=2.146616948.1514548670.1669628839-1569919106.1655970880



The required is:

- create API or any way of connection makes any user register in my main website Appoinda.com, he will be automatically registered in the event and video conference dashboards.

- Add the option to hide or show the two dashboards for the super admin in the package plan.

- Add button link in admin dashboard to redirect to these dashboards.

- Add Label and keywords for these two buttons to the translation option.



So, the three dashboards will act like a one website.



I didn’t buy the event and video dashboards yet, but I will do after the confirmation that you can do this task.