getting currently logged in username in jenkins java plugin

[shruthi ganesh]

Hi,
        I am writing a plugin to authorize an authenticated user in 
jenkins. I require the username of the currently logged in user. I have 
used mysql db for authentication. Is there any possibility of getting the 
username?. Does jenkins store the user details of the logged in user 
anywhere?.                                                                 
                                                                            
     



Thanks in advance.

Regards,
 --Shruthi Ganesh