Refactor sso to use Credential::Creation

### Verification
 - [ ] get a native meterp session on a windows box that has local users with non-blank passwords
  - [ ] if WOW64, migrate into a 64-bit process
 - [ ] `use post/windows/gather/credentials/sso`
 - [ ] `set SESSION -1`
 - [ ] `run`
   - It should print some passwords here
 - [ ] `creds`
 - [ ] **VERIFY** the passwords printed above are stored as creds