Separation of errors about authorization vs authentication

[mrquincle]

Currently trying to obtain a sphere with an incorrect id, for example id 0 leads to 401 errors:

http://crownstone-cloud.herokuapp.com/explorer/#!/Sphere/Sphere_findById

This is exactly the same error as when login doesn't succeed.

It is recommended to use 403 errors for authorization / application logic:

• See stackoverflow
• This will also make it easier to see how a connection fails to the cloud.

[AlexDM0]

I agree. We'll have to backtrack where these are generated. Odds are that they're loopback native..