added / implemented group API

models/user_model.py

@@ -434,6 +434,14 @@ class Group(db.Model):
         """
         return Group.query.filter(Group.name == name).first()
 
+    @staticmethod
+    def get_all():
+        """
+        Return all groups
+        :return:
+        """
+        return Group.query.all()
+
     def __str__(self):
         return self.name