add tenant logic

backend/app/core/dbmanager.py

@@ -0,0 +1,12 @@
+
+from fastapi import Depends
+from app.db.session import get_tenant_db,get_user_db
+from app.core import tenantCacheService
+
+def get_db(tenant:str = "1",tenantdb = Depends(get_tenant_db)):
+    db_url = tenantCacheService.get_tenant_db(tenantdb,tenant)
+    db =  get_user_db(db_url)
+    try:
+        yield db  
+    finally:
+        db.close()