Sintesis Metal Organic Framework (MOF) Berbasis Logam Ca, Sr, dan Ba dengan Ligan Asam Glutamat sebagai Fotokatalis dalam Degradasi Zat Warna Metilen Biru = Synthesis of Metal Organic Framework (MOF) Based on Ca, Sr, and Ba Metals with Glutamic Acid Ligands as Photocatalysts in the Degradation of Methylene Blue Dyes