Use osin.ErrNotFound for notfound errors

[henriquechehad]

For Not Found errors it's returning server_error message.

It should use the osin.ErrNotFound as default error.

Like here: https://github.com/RangelReale/osin/blob/master/access.go#L529

That is actually returning the server error message:
https://github.com/RangelReale/osin/blob/master/access.go#L534

As defined in Osin's storage interface:
https://github.com/RangelReale/osin/blob/master/storage.go#L12

[henriquechehad]

@uniplaces @arvenil could you review please?

[henriquechehad]

Thanks @arvenil. Also can you merge?

[arvenil]

@henriquechehad Nope, I don't own this repository anymore. Are you using osin and this uniplaces/osin-dynamodb ? In open source or closed project? I have a fork in which I could do it https://github.com/arvenil/osin-dynamodb but in 2 years nobody was interested in this lib ;) And I don't use it at all. But feel free to make PR there.

If today I would need to implement OAuth 2.0 server I would probably try https://github.com/ory/hydra and https://github.com/ory/fosite or anything else that came in those 2 long years (unless really osin got better quality over those 2 years).

[henriquechehad]

@arvenil I'll send the PR there. it's a private project.

Are those others with dynamodb support ready?

[henriquechehad]

Created new PR arvenil#1 for arvenil/osin-dynamodb