Add post_identities endpoint support

[jmaeso]

Opening PR since looks to be the only way of running tests. Pending to verify if the feature works

[jmaeso]

Sorry, I'm not sure how to run the Test action 😅

[alexkappa]

Hi @jmaeso, thank you for taking the time to put this together!

The code looks pretty good. I made a couple of suggestions on aligning it more with the conventions used throughout the codebase.

Once ready you can ping me again so I can test/merge.

Cheers,
Alex

[alexkappa]

We can also create a couple users, that better represent linking between two identities. We can make a better example of linking Batman to Bruce Wayne or Heisenberg to Walter White 😄

Just remember to clean up once done

t.Cleanup(func() { 
	m.User.Delete(walter.GetID())
	m.User.Delete(heisenberg.GetID())
})

[jmaeso]

Good comments @alexkappa , they make sense, I'll address them ASAP.
This morning though I tried to test the implementation. Unfortunately doesn't work, it will need some changes/additions into the internals of the library:
The way the manager.Request() works is that reuses the request's body to unmarhsal the server's response and in this case, both the payloads are different and cannot be reused.
Not sure how would you address this point. Playing withRequestOption (not sure if would work)? A new Request method? Update the existent method to decouple request & response types?

[jmaeso]

ping @alexkappa
Last changes are tested on some personal script, so should pass the tests. This being said, if you have concerns about the chosen solution, feel free to discuss alternatives

[alexkappa]

Thanks @jmaeso, sorry about the request/response limitations you are experiencing here. It's quite uncommon but happens from time to time the payload of the request being different than that of the response.

For now I would suggest calling the contents of RequestWithCustomResponse directly within the Link method. I can try to think of a way to make parsing the response easier in the future.

[jmaeso]

Comments applied @alexkappa

[alexkappa]

Nicely done @jmaeso! I've tested locally and merged it in. Will publish a release shortly.