README: Example on getting the tokens you should remove

[johanforssell]

Example of how to find the tokens which you couldn't send to.
I'm maching the two arrays together and then filtering it to get a list of tokens.

[hypesystem]

Thank you for the time you took to contribute 😄

Here are my thoughts:

Isn't the code wrong, mapping all responses without errors (where res.error is falsy, so !!res.error == false) to undefined? Shouldn't it be the opposite?

I would prefer using null to undefined in the code example, too.

In addition, I think the !! are adding confusion, as the evaluation would be the same without them...

Other than that, it is a good example 😄

[hypesystem]

Thanks for the quick update 😄

I still think the check for res.error might be wrong --- shouldn't it be !res.error?

[johanforssell]

My thinking is that the .map() goes through the array of results. Where there is an error, pick the token from the other array. Otherwise, pick nothing/null. Remember, we're collecting the tokens of erronous sends, in order to purge them from the database.

[hypesystem]

Ah yes, you are absolutely right, I was just reading it wrong! I blame being tired 😄

Maybe we could avoid people like me misunderstanding the code in the future by adding a bit more of a comment?

[hypesystem]

This looks good to me! Remember to add yourself to contributors in package.json 😄

@eladnava any comments on this before we merge?

[eladnava]

Just reviewed, looks good to me! 💯 Thanks so much @johanforssell for the excellent work.

[hypesystem]

Thanks for the contribution @johanforssell ! 😄