import type { binding } from "../binding";
/**
 * Authentication provider where users identify using an API-key.
 * @deprecated https://www.mongodb.com/docs/atlas/app-services/reference/push-notifications/
 */
export declare class PushClient {
    /** @internal */
    private user;
    /** @internal */
    internal: binding.PushClient;
    /** @internal */
    constructor(user: binding.User, internal: binding.PushClient);
    /**
     * Register this device with the user.
     * @param token - A Firebase Cloud Messaging (FCM) token, retrieved via the firebase SDK.
     * @returns A promise that resolves once the device has been registered.
     */
    register(token: string): Promise<void>;
    /**
     * Deregister this device with the user, to disable sending messages to this device.
     * @returns A promise that resolves once the device has been deregistered.
     */
    deregister(): Promise<void>;
}