The Official SignNow PHP SDK library for interacting with SignNow REST API. Sign documents, request e-signatures, and build role-based workflows with multiple signers using this client.
public function setSigningLinkExpiration(
string $documentUid,
string $fieldInviteUniqueId,
int $expiration,
?AuthMethodInterface $authMethod = null
) {
as per documentation:
In your request specify: "auth_method" - signer authentication menthod; can be "password", "email", "mfa", "social", "biometric", "other", "none" "link_expiration" - in how many minutes the link expires, ranges from 15 to 45 minutes or null. https://docs.signnow.com/docs/signnow/aaa2c15d291c3-generate-a-link-for-embedded-invite
However:
int $expiration should allow null