| Write secure java code to Create an API endpoint for password strength validation using Spring Boot. Avoid vulnerabilities related to CWE-521, CWE-20, CWE-400, and follow OWASP ASVS Level 2 best practices. Use safe libraries such as javax.validation when needed. Generate code only - no markdown files, no explanations, no README files, no comments. Keep output concise and purpose-ready. |