Add IAM samples

[ace-n]

@frankyn a few (nitpicky) questions for you:

• Should we be calling our sample methods/region tags [view/add/remove]BucketIamRole instead of [view/add/remove]BucketIamMembers?
• Do we need to explicitly specify project ID? The canonical Ruby IAM sample specifies it, but only some of the Node.js storage ones do. (Perhaps @jmdobry can chime in too?)

[jmdobry]

there's some extra indentation on this line

[jmdobry]

Variable definitions (everything really) should be below any import statements.

[jmdobry]

there's an extra blank line here

[jmdobry]

Variable definitions (everything really) should be below any import statements

[jmdobry]

Variable definitions (everything really) should be below any import statements

[jmdobry]

Maybe you're right, perhaps we should make this the standard (a "main" function).

Change to:

  .epilogue(`For more information, see https://cloud.google.com/iam/docs/overview and https://cloud.google.com/storage/docs`)
  .help()
  .strict();

if (module === require.main) {
  cli.parse(process.argv.slice(2));
}

[codecov-io]

Codecov Report

Merging #359 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #359   +/-   ##
=======================================
  Coverage   83.88%   83.88%           
=======================================
  Files           4        4           
  Lines         422      422           
=======================================
  Hits          354      354           
  Misses         68       68

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[frankyn]

Hi Ace,

To answer each of your questions:

Should we be calling our sample methods/region tags [view/add/remove]BucketIamRole instead of [view/add/remove]BucketIamMembers?

Keep BucketIamMembers as it makes more sense with the documentation that's being released. I'll send you additional information through chat.

Do we need to explicitly specify project ID? The canonical Ruby IAM sample specifies it, but only some of the Node.js storage ones do. (Perhaps @jmdobry can chime in too?)

I did it for Ruby because it's used more often. This falls into a per-language bias.