code: public TokenAuthorisation getSessionTokenLogin(TokenAuthorisation token, String username, String password) throws MovieDbException {
          return tmdbAuth.getSessionTokenLogin(token, username, password);
      }
docs: This method is used to generate a session id for user based
  authentication. User must provide their username and password
  
  A session id is required in order to use any of the write methods.
  
  @param token Session token
  @param username User's username
  @param password User's password
  @return TokenAuthorisation
  @throws MovieDbException exception