show seesion code

[Michal Hužva]

I am encountering a problem with referencing different surveys. In my run, I aim to display the participant's session ID by referring to the previous survey they completed during the run. Here is the code I used:

```{r} cat(previous_survey$session) ```

However, this code returns 'NULL'. Could someone suggest an alternative method to display the participant's session code?

[Ruben Arslan]

Simply use user_id

```{r} user_id ```