Help, Max users for a realm

[John & Nadine <jon-nad@post.guernsey.net>]

I am configuring PI3 for the first time, beta 4 on windows 95, and I have
created a realm for access, however, once I reach 100 users in total in all
realms the program cannot load the config file after 100 - Is this a
physical limit and is their a work around ?

Also, how would I create two levels of access, say one to the root and no
further down, and 2 for the whole site, this is irrelevant if the 100 users
is a physical limit, however, the way I see it a the moment is that I
create another realm OK, but have to re-enter all the passwords again, with
a lot of users this is a monumental task - any tips

John