Autocert EAB MAC Key
- Environmental Variable: 
AUTOCERT_EAB_MAC_KEY - Config File Key: 
autocert_eab_mac_key - Type: 
stringcontaining a base64url-encoded secret key - Optional
 
Autocert EAB MAC Key is the base64url-encoded secret key corresponding to the Autocert EAB Key ID.
This setting is required when Autocert EAB Key ID is set.