I try to get an Auth Token on both ways suggested in help but without success.

for this:  https://accounts.zoho.com/apiauthtoken/create?SCOPE

#
#Wed Apr 13 16:07:34 PDT 2016
CAUSE=EXCEEDED_MAXIMUM_ALLOWED_AUTHTOKENS
RESULT=FALSE

I am logged in that browser, so that cannot be an issue. 

Could you please advise?

Thanks

Balazs