Neo4j and FastApi concurrency

I am trying make a fastapi app using the neo4j python driver (4.2.0) to connect to neo.
I am not very successful, as queries from one user block the queries from other users and I cant figure out why. Any helpful suggestions?

My code looks something like this:

from neo4j import GraphDatabase
from fastapi impor t FastAPI
neo4j_uri, username, password = get_neo_parameters()
app = FastAPI()

def get_driver(uri, username, password):
    driver = GraphDatabase.driver(uri, auth=(username, password))
    return driver

def run_graph_queries(uri, username, password, queries):
    driver = get_driver(uri, username, password)
    with driver.session() as session:
        r = session.read_transaction(do_graph_queries, queries)
        return r

def do_graph_query(tx, queries):
    result = []
    for query in queries:
        res =['query'], query['parameters'])
    return result

app.run_graph_queries = lamba x: run_graph_queries(neo4j_uri, username, password, x)"app", port=9999)

and then my endpoints calls with queries from a POST.

I would be very grateful if someone could explain to me why this blocks all users..


I haven't used uvicorn before, but does it do multi-threading by default?