Based on the module synopsis, you should be able to do: 
for my $doc ( $response->docs ) {
    print $doc->value_for( 'author_id' );
}

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                "Imaginary friends are a sign of a mental disorder if they cause distress, including antisocial behavior. Religion frequently meets that description"

In reply to Re: How to retrieve WebService::Solr facet value properly? by NetWallah
in thread How to retrieve WebService::Solr facet value properly? by swiftlet

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