[Home](./index.md) > [kibana-plugin-server](./kibana-plugin-server.md) > [AuthenticationHandler](./kibana-plugin-server.authenticationhandler.md) ## AuthenticationHandler type See [AuthToolkit](./kibana-plugin-server.authtoolkit.md). Signature: ```typescript export declare type AuthenticationHandler = (request: KibanaRequest, response: LifecycleResponseFactory, toolkit: AuthToolkit) => AuthResult | IKibanaResponse | Promise; ```