curl https://api.goaura.com/listings \
    -u key_2ubjfjUcF0z6lcFio24TC1D9xUa:
    # The colon prevents curl from asking for a password.
All Aura API endpoints are authenticated using API keys. You can view and manage your API keys in Aura Settings. Your API keys carry many privileges, so be sure to keep them secure! Do not share your secret API keys in publicly accessible areas such as GitHub, client-side code, and so forth. Authentication to the API is performed via HTTP Basic Auth. Provide your API key as the basic auth username value. You do not need to provide a password. If you need to authenticate via bearer auth (e.g., for a cross-origin request), use -H "Authorization: Bearer key_2ubjfjUcF0z6lcFio24TC1D9xUa" instead of -u key_2ubjfjUcF0z6lcFio24TC1D9xUa. All API requests must be made over HTTPS. Calls made over plain HTTP will fail. API requests without authentication will also fail. 
  curl https://api.goaura.com/listings \
    -u key_2ubjfjUcF0z6lcFio24TC1D9xUa:
    # The colon prevents curl from asking for a password.