ok This is correct and it works as you say.
The only user who passed login on page alirecenze.cz was admin, who`s email was in database already. So it was just linked together.
Anyway it is very strange that one user passes in same browser and other not. I got an error from FB.
Also it happens that just black page appears for a minute and than I got many login pages under each other.
Now, I am not able to login to pages as I got always error Invalid token.
I am not sure why this is so complicated

Are you able to connect to my page and resolve problem, I am spending to much time with one app, what shoudl do very simple thing = move data from one page to another and work with it.