pyVMC config show / build fails if config.ini entries are incorrect

[fr0gger03]

Describe the bug

If using either of the following commands, user receives 400 error if config.ini is incorrect:

pyVMC.py config show
pyVMC.py config build

Reproduction steps

1. alter config.ini to contain incorrect values for refresh token, ORG ID, or SDDC ID
   2.run either command:

pyVMC.py config show
pyVMC.py config build

3. user will receive 400 error and program will exit
   ...

Expected behavior

As these commands are intended to help the user troubleshoot / build a new config file, these commands should bypass the retrieval of the access token, and simply execute.

Additional context

No response