Certificate Validation:
 https://www.credly.com/go/bb8tTr1n 

 References:
 https://www.apisecuniversity.com 
 https://csbygb.gitbook.io/pentips/web-pentesting/api 
 https://book.hacktricks.xyz/welcome/readme 
 https://cyc0rpion.medium.com/exploiting-owasp-top-10-api-vulnerabilities-fb9d4b1dd471
 https://discord.gg/cC6b5NWTgX