Improve JWTComponent to access both access and refresh tokens

[migduroli]

Summary

Improve JWTComponent to access both access and refresh tokens

Motivation

Our current implementation of the JWTComponent does not have the capacity to bear the access and refresh token at the same time. This leads to issues when using both tokens at the same time in a JWT-protected API.

Proposed changes

We suggest a change of name for the class JWTComponent towards AuthTokensComponent to better represent the output of the resolve() method, which should become an object with both the access and refresh tokens (i.e., jwt.JWT objects).