Remove credential values from env files

Blank out API_USERNAME and API_PASSWORD in .env and .env.staging.
Keys and base URLs are kept; values are supplied locally.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

.env

@@ -1,7 +1,7 @@
 # API Configuration
 API_BASE_URL=https://www.babinnovations.com
-API_USERNAME=ahmedmonire@gmail.com
-API_PASSWORD=Mav@1234
+API_USERNAME=
+API_PASSWORD=
 CASHIER_USERNAME=
 CASHIER_PASSWORD=
 

.env.staging

@@ -1,7 +1,7 @@
 # API Configuration
 API_BASE_URL=https://stagingenv.babinnovations.com
-API_USERNAME=ahmedalnukhalah@gmail.com
-API_PASSWORD=Mav@1234
+API_USERNAME=
+API_PASSWORD=
 CASHIER_USERNAME=
 CASHIER_PASSWORD=