{"text_format":"3","workbook":"xlsx","n_sheets":4,"sheets":["users","items","loans","lockers"],"read":"whole","date_system":"1900"}

{"sheet":"users","index":0,"n_rows":3,"n_cols":4,"rows_kept":3}
["id","username","password","role"]
[1,"theis","passwort","admin"]
[2,"Robin","passwort","camera-sound"]

{"sheet":"items","index":1,"n_rows":3,"n_cols":3,"rows_kept":3}
["id","item_name","can_borrow_role"]
[1,"Gimbal","admin"]
[2,"Kamera","camera-sound"]

{"sheet":"loans","index":2,"n_rows":2,"n_cols":7,"rows_kept":2}
["id","username","loan_code","start_date","end_date","returned_date","created_at"]
[1,"theis",12345678,"18-08-2025_13-00","18-08-2025_18-00","null","18-08-2025_10-00"]

{"sheet":"lockers","index":3,"n_rows":2,"n_cols":3,"rows_kept":2}
["id","item","locker_number"]
[1,"Kamera",1]