The user's account password for authentication.
This will only be set after authentication using authenticate is completed successfully. It will then be set to the password passed to authenticate, and a notify signal will be emitted. If authentication fails, it will be set to null.
If libgdata is compiled with libgcr support, the password will be stored in non-pageable memory. However, if it is retrieved using @get (or related functions) it will be copied to non-pageable memory and could end up being written to disk. Accessing the password using get_password will not perform any copies, and so maintains privacy.