dynamo-client using local dynamodb client

I'm trying to connect to my DynamoDB local using the npm lib dynamo-client. I have the local DynamoDB client install and running as per:

• https://aws.amazon.com/blogs/aws/dynamodb-local-for-desktop-development

However trying to connect to my localhost using:

db = dynamo.createClient('localhost', dbConf.credentials)
db.request('ListTables','', (e,r) -> console.log(e))

gives the following error:

e: {"code":"ECONNREFUSED","errno":"ECONNREFUSED","syscall":"connect"}

Needed to set the port and host in the options:

dbConf =
  region:
    region: 'localhost'
    host: 'localhost'
    port: 8000
  credentials:
    secretAccessKey: "KEY"
    accessKeyId: "ACCESSKEY"

db = dynamo.createClient(dbConf, dbConf.credentials)