401 (Unauthorized) error should contain options with a body stating where is the error

[ibuziuk]

Another thing I need from che starter is a fine grained "401 (Unauthorized)" response on LIST/POST options with a body stating where you got the error e.g. is is the KC token that is broken, or the token for oso or from github that way we can report back to 'someone' in Platform that can redirect user to refresh tokens etc.
che-starter knows which 'broker' you got the token from and if it worked or not. so report that 401

{broker: 'x', msg: 'invalid token' }