Rewrite / Improve error handling

[TimMikeladze]

Currently the apollo-errors package is being consumed by our custom AccountsError class to throw errors. Moving forward we can continue using apollo-errors or make our own custom error class. The reason behind using apollo-errors is that it allows errors to carry more data than just an error message, this is particularly useful in the case of validation errors where you want to associate errors with certain fields. Furthermore this allows http status codes to be sent along side the message, rather than within it.

The other packages that consume @accounts/accounts: rest-api, rest, react and the db interfaces will also need their error handling code to be updated as part of this issue.

[TimMikeladze]

@davidyaha Maybe you could tackle this issue?

[davidyaha]

On vacation till Monday but I'll take a look when I get back. Rest-example is currently working?

[TimMikeladze]

Yep, on the devel branch with redis as the data store. It's working, will be working even better by Monday 😜 , dedicating the entire weekend to this. Thanks!

[davidyaha]

Nice! Have fun!