Module credentials 

Credential storage and retrieval for Syncable authentication

Stores authentication tokens in ~/.syncable.toml

Enums

AuthStatus

Authentication status enum

Functions

clear_credentials

Clear stored credentials (logout)

get_access_token

Get the current access token if valid

get_auth_status

Get authentication status including expiry info

get_user_email

Get the authenticated user’s email

is_authenticated

Check if the user is currently authenticated with a valid token

save_credentials

Save credentials to global config file