I stopped using neo4j.jl as I found it buggy and use cypher-shell instead which is quite reliable albeit slow.
You can try it out with:
cypher-shell -a neo4j://localhost:7687 --format plain -u USER -p PASSWORD 'match (n) return n'
where -a specifies the address:port. In julia, you can do
read(`cypher-shell -a neo4j://localhost:7687 --format plain -u USER -p PASSWORD 'match (n) return n'`, String)
and process manually the resulting string