Thanks for your reply @RobertG. I find this function in LO Base confusing. The function is completely inactive with HSQLDB since there can only be one user with no password protection. Here, I am using Mariadb with an ODBC connection such that the user administration function is available, but non-functional. My use of LO Base with Mariadb is a basic set-up that should engage this function.
Are you aware of any instance in which the “Tools>User Administration” function actually works?