Security Alert: Hardcoded Password & SQL Injection in `app.py` Exposes Database

A critical security vulnerability has been flagged in the `app.py` source code, where a password is hardcoded directly into the application logic. This high-severity issue, classified under CWE-798 (Use of Hard-Coded Credentials), creates a direct path for credential exposure if the code is leaked or accessed by unauthorized personnel. The vulnerability is compounded by a clear SQL injection flaw on the same line, dramatically increasing the risk of a complete database compromise.

The specific exposure occurs on line 60 of the file, where the code constructs a database query using an f-string that directly interpolates user-supplied `username` and `password` variables. This pattern, identified as `SEC-SEC-001`, not only embeds sensitive logic but also fails to use parameterized queries, allowing attackers to manipulate the SQL statement. The code snippet shows the credentials are part of the query string itself, which is then logged in plain text, further amplifying the security failure.

This dual flaw poses a severe threat to data integrity and system security. Hardcoded credentials cannot be rotated without a code change, and the SQL injection vulnerability could allow unauthorized data access, deletion, or exfiltration. The suggested fix is to immediately remove hardcoded values, store credentials in environment variables or a dedicated secrets management system like AWS Secrets Manager or HashiCorp Vault, and refactor the database interaction to use parameterized queries to eliminate injection risks.