crypto.createHmac update digest

[CHANDRAMOHANnegi]

const reqBodyDigest = crypto.createHmac('sha1', PERSONALIZATION_AUTH_KEY)
  .update(JSON.stringify({ userId: "1234", usecases: [1, 2, 3] }))
  .digest('hex');

How can i get this response

    /**
     * Updates the `Hmac` content with the given `data`, the encoding of which
     * is given in `inputEncoding`.
     * If `encoding` is not provided, and the `data` is a string, an
     * encoding of `'utf8'` is enforced. If `data` is a `Buffer`, `TypedArray`, or`DataView`, then `inputEncoding` is ignored.
     *
     * This can be called many times with new data as it is streamed.
     * @since v0.1.94
     * @param inputEncoding The `encoding` of the `data` string.
     */
    update(data: BinaryLike): Hmac;
    update(data: string, inputEncoding: Encoding): Hmac;
    /**
     * Calculates the HMAC digest of all of the data passed using `hmac.update()`.
     * If `encoding` is
     * provided a string is returned; otherwise a `Buffer` is returned;
     *
     * The `Hmac` object can not be used again after `hmac.digest()` has been
     * called. Multiple calls to `hmac.digest()` will result in an error being thrown.
     * @since v0.1.94
     * @param encoding The `encoding` of the return value.
     */
    digest(): Buffer;
    digest(encoding: BinaryToTextEncoding): string;