Returns the session_token and session_jwt values associated with the logged-in user's active session. If no active session is present, returns null.
Note that the Stytch SDK stores the session_token and session_jwt values as session cookies in the user's browser. Those cookies will be automatically included in any request that your frontend makes to a service (such as your backend) that shares the domain set on the cookies, so in most cases, you will not need to explicitly retrieve the session_token and session_jwt values using the getTokens() method. However, we offer this method to serve some unique use cases where explicitly retrieving the tokens may be necessary.