Make cwctl sectoken get try the refresh token before trying credentials

[markcor11]

Codewind version: 0.8.0

Description of the enhancement:
Make cwctl sectoken get try the refresh token before trying credentials

Since CWCTL already knows and has a recent refresh-token, it would improve the user experience by allowing cwctl to use this refresh-token when requesting an access-token BEFORE using attempting to use the username:password combo from the keychain.

Proposed solution:
Refresh is currently provided by cwctl sectoken refresh however that means the consumer needs to hold the refresh token. Propose a modification to cwctl sectoken get that first tries the refresh from the keychain which was generated on the last successful login, if that fails, then it should try the current username:password approach.