arc.tables() - pass in settings / credentials

[kenhorn]

Is your feature request related to a problem? Please describe.
I'd like to use arc.tables() to access dynamo/documentclient, however, I want to do this via an assumed role.

Describe the solution you'd like
Ideally arc.tables(settings) , which would be passed through to new AWS.DynamoDB(settings), and on to the DocumentClient wrapper.

Describe alternatives you've considered
Currently just using DocumentClient directly, via above settings.

[ryanblock]

What's the use case for this? It's not a bad idea, but this Architect plugin may be what you're looking for if the use case is to talk to DynamoDB tables outside of a given Architect app: https://github.com/architect/plugin-external-tables

[kenhorn]

My use is to allow architect to define the table names, but be able to adjust other options to the constructor - specifically the credentials so that the connection can be for a specific role/identity (I'm using per tenant credentials, vs the lambda's own role)

// eg currently opts contains aws credentials
opts.endpoint = data._db.endpoint.href;
var db = new AWS.DynamoDB(opts);
var doc = new AWS.DynamoDB.DocumentClient({service:db});