A Joomla CMS specialist is required

I was the organizer of the project in the person of the General Director and the Manager of the online store legal address LLC "Prima-Universal" but not the executor, there is access to the control panel VirtueMart site Softclim.ru with the entire database. The problem is how to transfer access so that it is all on the new domain and host to transfer. I don't have passwords, I'm clicking on the link.
Question: In the instructions for using the admin panel, it says that I can change the log and password. If I change them, can I give them to you to have access to the admin panel?