How do I bring realtime data from Firebase Realtime DB into my thunkable app?

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This is what I have in my realtime db (it refreshes data every second) so how can I display this into my app?

You can get each key value by using a variable block: cloud variable “FirebaseIOT/humidity”

How would that work? Could you please include a screenshot of this code as I do not know how to use cloud variables.

all the resources given by thunkable are not helpful, I would appreciate it if you could send me a screenshot of code which would help directly, thank you so much