Puppet users - Jul 2014 - error. only root user can exec comands

Hi,
 
I am having an issue with exc statement. running through non-root user.
 
*Error: Failed to apply catalog: Parameter user failed on Exec[extract 
p17071663_1036_Generic.zip]: Only root can execute commands as other users 
at 
/etc/puppetlabs/puppet/environments/testing/modules/wls/manifests/bsupatch.pp*
 
 
*Let me know how to exec through non root user*
 
 
*my code is:*
 





*exec { "extract ${patchFile}":    113             command =>
"unzip -n
${puppetDownloadMntPoint}/${patchFile}         -d 
${mdwHome}/utils/bsu/cache_dir",    114             user   => 
"puppet-admin",    115             creates => 
"${mdwHome}/utils/bsu/cache_dir/${patchId}.jar",    116            
before
=> Bsu_patch[$patchId], Help me*

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