
Get the UniTCM API Key
get_api_key.RdChecks in order: (1) session value set via set_api_key(),
(2) environment variable UNITCM_API_KEY, (3) system keyring.

get_api_key.RdChecks in order: (1) session value set via set_api_key(),
(2) environment variable UNITCM_API_KEY, (3) system keyring.