Kausa sebagai Dasar Penilaian Keabsahan Jual Beli Berdasarkan Perjanjian Pengikatan Jual Beli dengan Kausa Utang Piutang (Studi Putusan Pengadilan Tata Usaha Negara Bandung Nomor 145/G/2020/PTUN.BDG) = Origin as the Basis for Assessing the Validity Of Sale and Purchase Agreements Based on Debt-Credit Binding Agreements (Study of Bandung State Administrative Court Decision Verdict Number 145/G/2020/PTUN.BDG)