Data stored in firebase disappears

Hi guys, I have an issue, can someone help?
When I store some data in firebase it stores fine,
but when I log out of the app and go back in, the data disappears from the database.

How can I fix this?
David -

This is the code – And actually as soon as I go back to the homescreen the data in firebase is resetscreenkodular

dont send any empty data, if you send any empty data to firebase, it crashes and empty all data