Copies the native credentials of type native_type from native
into credentials.
It is a programming error (which will cause a warning to be
logged) to use this method if there is no gio.Credentials support for
the OS or if native_type isn't supported by the OS.
Copies the native credentials of type native_type from native into credentials.
It is a programming error (which will cause a warning to be logged) to use this method if there is no gio.Credentials support for the OS or if native_type isn't supported by the OS.