[Home](./index.md) > [@digitalpersona/services](./services.md) > [AuthenticationData](./services.authenticationdata.md) > [handle](./services.authenticationdata.handle.md) ## AuthenticationData.handle property An authentication handle. The client must create the handle on [IAuthenticationClient.init()](./services.iauthenticationclient.init.md), and destroy on . Signature: ```typescript readonly handle: AuthenticationHandle; ```