Array Error Line 151

[GabrielPierce]

Error: Warning: array_map(): Argument #2 should be an array in /home/gabrielpierce/public_html/wp-content/plugins/wp-multisite-sso/wp-multisite-sso.php on line 145
`
// add reference to hash to the user's meta, store the time and all sso objects

	$user_meta = array(
		'hash'  => $user_hash,
		'value' => array(
			'timestamp' => $time,
			'keys'      => $sso_objects
		)
	);

	update_user_meta( $user->ID, self::USER_META_KEY, $user_meta );

	$action = self::LOGIN_ACTION;

	include __DIR__ . '/inc/sso.php';

	die;
}

`