Callback to be passed to signon_identity_store_credentials_with_args() or signon_identity_store_credentials_with_info().
the #SignonIdentity.
the numeric ID of the identity in the database.
a #GError if an error occurred, or %NULL otherwise.
Callback to be passed to signon_identity_store_credentials_with_args() or signon_identity_store_credentials_with_info().