spring security - How to access User object in grails controller -

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i'm using spring security, , need user domain object in controller.

if call springsecurityservice.getprincipal(), object of type org.codehaus.groovy.grails.plugins.springsecurity.grailsuser. however, i'm looking user domain object i've defined in config.groovy so:

grails.plugins.springsecurity.userlookup.userdomainclassname = 'project.auth.user'

how can best @ user domain object?

load user instance using cached id in grailsuser instance:

def user = user.get(springsecurityservice.principal.id)

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