[New Feature] Rest API implementation to showcase the OpenDBM features

rest_api/app/services/main.py

@@ -0,0 +1,20 @@
+from sqlalchemy.orm import Session
+from config.db import get_db
+
+user_db = get_db()
+
+class DBSessionContext(object):
+    def __init__(self, db: Session):
+        self.db = db
+
+
+class AppService(DBSessionContext):
+    pass
+
+
+class AppCRUD(DBSessionContext):
+    pass
+
+class OpenDBMSessionContext(object):
+    def __init__(self):
+        self.db = user_db