bp_get_current_activation_key()

function bp_get_current_activation_key() {
	$key = '';

	if ( bp_is_current_component( 'activate' ) ) {
		if ( isset( $_GET['key'] ) ) {
			$key = wp_unslash( $_GET['key'] );
		} else {
			$key = bp_current_action();
		}
	}

	/**
	 * Filters the activation key from the current request URL.
	 *
	 * @since BuddyPress 3.0.0
	 *
	 * @param string $key Activation key.
	 */
	return apply_filters( 'bp_get_current_activation_key', $key );
}