Visible error based SQL injection

https://portswigger.net/web-security/sql-injection/blind/lab-sql-injection-visible-error-based This lab contains a SQL injection vulnerability. The application uses a tracking cookie for analytics, and performs a SQL query containing the value of the submitted cookie. The results of the SQL query are not returned.

The database contains a different table called users, with columns called username and password. To solve the lab, find a way to leak the password for the administrator user, then log in to their account.

https://siunam321.github.io/ctf/portswigger-labs/SQL-Injection/sqli-13/