[Home](./index.md) > [@digitalpersona/authentication](./authentication.md) > [WindowsAuth](./authentication.windowsauth.md) > [authenticate](./authentication.windowsauth.authenticate.md) ## WindowsAuth.authenticate() method Authenticates using a currently logged Windows user. Signature: ```typescript authenticate(): Promise; ``` Returns: `Promise` a promise to return a JSON Web Token containing a claim (`crd`) showing the fact a currently logged Window account was used. Will reject if authentication fails.