informaton about user from FrontEndUsers module

[holy_knight]

I am making some kind of mailing pages for sending mail using FrontEndUSers module. How to find out mail and other information from users which is login in front end of site? Thanks on any help.
p.s. I have seen earlier some tag which display all information about variables but I cant found it again. Have someone tells me that tag.

[calguy1000]

{get_template_vars}

[holy_knight]

thanks.