Neptune: Python OpenCypher client

Question

I’m able to successfully connect to my Neptune instance with the code here: https://docs.aws.amazon.com/neptune/latest/userguide/iam-auth-connecting-python.html
Both Gremlin and OpenCypher queries work.
 
However, when using this code - https://docs.aws.amazon.com/neptune/latest/userguide/access-graph-opencypher-bolt.html#access-graph-opencypher-bolt-python-iam-auth – I am unsuccessful.
Error: neo4j.exceptions.DatabaseError: {code: "BoltProtocol.unexpectedException"} {message: "Unexpected server exception 'Internal Server Error'"}
 
I added the following lines at the end:
URL="bolt://xxxyyy.us-east-1.neptune.amazonaws.com:8182"
 
access_key = os.getenv('AWS_ACCESS_KEY_ID', '')
secret_key = os.getenv('AWS_SECRET_ACCESS_KEY', '')
region = os.getenv('SERVICE_REGION', '')
session_token = os.getenv('AWS_SESSION_TOKEN', '')
 
creds = SimpleNamespace(access_key=access_key, secret_key=secret_key, token=session_token, region=region)
 
authToken = NeptuneAuthToken(creds, region, URL)
driver = GraphDatabase.driver(URL, auth=authToken, encrypted=True)
session = driver.session()
session.run("match (c:Customer) return c.mid as mid limit 1")
 
What am I doing wrong?

Taylor-AWS · Answer

The best way to handle fetching credentials is to let boto3 fetch them.  It will walk the list of credential providers until it finds them in environment variables, via associated role, AWS CLI profile,etc.:

```
URL="bolt://:"

session = Session()
creds = session.get_credentials()
region = ''

authToken = NeptuneAuthToken(creds, region, URL)

driver = GraphDatabase.driver(URL, auth=authToken, encrypted=True) 
drs = driver.session()

res = drs.run("match (a:Artist) return a.name as name limit 1")
for rec in res:
  print(rec)
driver.close()
```

Neptune: Python OpenCypher client

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