Function stringifySignedCookie

stringifySignedCookie(
    name: string,
    value: string,
    secret: string | BufferSource,
    options?: CookieOptions,
): Promise<string>
Signs and stringifies cookie and corresponding options.
Parameters
- name: string
  The name of a cookie.
- value: string
  The cookie value
- secret: string | BufferSource
  The signing secret key.
- Optionaloptions: CookieOptions
  Additional cookie options.
Returns Promise<string>
Set-Cookie header value.