feat: add user and post management with CRUD operations; include tests for functionality

db.py

@@ -0,0 +1,20 @@
+from sqlalchemy import create_engine, Column, Integer,String, ForeignKey
+from sqlalchemy.engine import URL
+from sqlalchemy.orm import sessionmaker, Session, declarative_base
+
+
+# Database setup
+DATABASE_URL = "sqlite:///./test.db"
+engine = create_engine(DATABASE_URL)
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+Base = declarative_base()
+
+
+
+
+def get_db():
+    db = SessionLocal()
+    try:
+        yield db
+    finally:
+        db.close()