Removed DB Env Vars

config.py

-import os
 
 class Config:
-    # Database connection - use environment variables
-    MYSQL_USER = os.getenv('MYSQL_USER', 'root')
-    MYSQL_PASSWORD = os.getenv('MYSQL_PASSWORD', 'root')
-    MYSQL_HOST = os.getenv('MYSQL_HOST', 'localhost')
-    MYSQL_PORT = os.getenv('MYSQL_PORT', '3306')
-    MYSQL_DB = os.getenv('MYSQL_DB', 'car_rental')
+    MYSQL_USER = 'root'
+    MYSQL_PASSWORD = 'root'
+    MYSQL_HOST = 'localhost'
+    MYSQL_PORT = '3306'
+    MYSQL_DB = 'car_rental'
+
+    SQLALCHEMY_DATABASE_URI = f"mysql+pymysql://{MYSQL_USER}:{MYSQL_PASSWORD}@{MYSQL_HOST}:{MYSQL_PORT}/{MYSQL_DB}"
     
-    SQLALCHEMY_DATABASE_URI = os.getenv(
-        'DATABASE_URL',
-        f"mysql+pymysql://{MYSQL_USER}:{MYSQL_PASSWORD}@{MYSQL_HOST}:{MYSQL_PORT}/{MYSQL_DB}"
-    )
     SQLALCHEMY_TRACK_MODIFICATIONS = False