elasticsearch mongoosastic count api and min_score

Question

Who knows how can I use _count API from elasticserch in mongoosastic with node.js ? Also I cant query with min_score.

{
    min_score: 1,
    query_string: {
        query : query[ 'search' ]
    }
}

this query gives me an error

[query_parsing_exception] [_na] query malformed, no field after start_object, with { index=users line=1 col=11 }