[feature] GUAC-Neptune database connection

[stevemenezes]

Is your feature request related to a problem? Please describe. Implement the connection logic for AWS Neptune DB with GUAC.

Describe the solution you'd like Users should be able to configure a connection with their Neptune clusters. This could be implemented as a part of the guacone command where users can pass in additional params. Describe alternatives you've considered N/A

Additional context You can use this documentation as a reference https://docs.aws.amazon.com/neptune/latest/userguide/access-graph-opencypher-bolt.html#access-graph-opencypher-bolt-golang-iam-auth

We would want to implement this in a configurable manner such that users can plug and play with cluster endpoints in different regions.

[lumjjb]

@stevemenezes it looks like your PR fixes this - is it good to close this?

[stevemenezes]

@lumjjb there's still a fix to do but we're holding it off for now since AWS would be releasing SDKs capable of querying the Neptune DB (in a week's time or so). Might be worth the wait in order to avoid reinventing the wheel.