mix aws.kinesis.tail is touted but not implemented

[janxious]

Environment

• Elixir & Erlang versions (elixir --version)

$ elixir --version
Erlang/OTP 22 [erts-10.6.2] [source] [64-bit] [smp:12:12] [ds:12:12:10] [async-threads:1] [hipe] [dtrace]

Elixir 1.10.0 (compiled with Erlang/OTP 22)

• ExAws version mix deps | grep ex_aws

$ mix deps | grep ex_aws
* ex_aws 2.1.0 (Hex package) (mix)
  locked at 2.1.0 (ex_aws) b9265152
* ex_aws_kinesis 2.0.1 (Hex package) (mix)
  locked at 2.0.1 (ex_aws_kinesis) 7f8746e8

• HTTP client version. IE for hackney do mix deps | grep hackney

$ mix deps | grep hackney
* hackney 1.15.2 (Hex package) (rebar3)
  locked at 1.15.2 (hackney) 07e33c79

Current behavior

Include code samples, errors and stacktraces if appropriate.

$ mix aws.kinesis.tail <a-valid-stream>
** (RuntimeError) Not yet implemented in 1.0.0-beta1
    lib/mix/tasks/tail.ex:23: Mix.Tasks.Aws.Kinesis.Tail.run/1
    (mix 1.10.0) lib/mix/task.ex:330: Mix.Task.run_task/3
    (mix 1.10.0) lib/mix/cli.ex:82: Mix.CLI.run_task/2
    (elixir 1.10.0) lib/code.ex:917: Code.require_file/2

There is this bit in the readme: https://github.com/ex-aws/ex_aws/blame/master/README.md#L182

But then the code is actually this: https://github.com/ex-aws/ex_aws/blob/master/lib/mix/tasks/tail.ex#L22-L24

Expected behavior

I dunno, but probably something that spits out data bits as they hit a stream.