In security assist authenticate user server behavior [General Tab] I chose Trigger> Rule: LogIn success. (Leave the rest empty.)
In [Database Tab] I chose my connection, and 'users' table, hit '+' sign chose userName, hit lightning bolt for value, chose Session> userName
In [Session Values Tab] I hit '+' sign chose userName column which gives a Session Name of userName.
Go to Bindings> select the username session and click the insert button.
Hit O.K. button for all, preview in browser and see a completely blank page.
Thanks