updates

Backend/requirements.txt

@@ -21,6 +21,13 @@ paypal-checkout-serversdk>=1.0.3
 pyotp==2.9.0
 qrcode[pil]==7.4.2
 httpx==0.25.2
+cryptography>=41.0.7
+
+# Testing dependencies
+pytest==7.4.3
+pytest-asyncio==0.21.1
+pytest-cov==4.1.0
+pytest-mock==3.12.0
 
 # Enterprise features (optional but recommended)
 # redis==5.0.1  # Uncomment if using Redis caching