- Extract validations to the validations middleware to clean it up
- Remove resourceId since it throws an error in the mutation if the user
asks for it back, and the resourceId is returned in post/comment/user.id
- use writeTxResultPromise to benefit from automatic retries
- more descriptive variable naming
- extract cypher query to make db manipulation into script so that it
can be run from the command line, at least locally.
