Warning: Undefined array key "num" in C:\Bitnami\wampstack-8.0.3-0\apache2\htdocs\day7\ex\delete.php on line 2

Warning: mysqli_connect(): (HY000/1045): Access denied for user 'gosu1234'@'localhost' (using password: YES) in C:\Bitnami\wampstack-8.0.3-0\apache2\htdocs\day7\ex\dbcon.php on line 3

Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, bool given in C:\Bitnami\wampstack-8.0.3-0\apache2\htdocs\day7\ex\delete.php:10 Stack trace: #0 C:\Bitnami\wampstack-8.0.3-0\apache2\htdocs\day7\ex\delete.php(10): mysqli_query() #1 {main} thrown in C:\Bitnami\wampstack-8.0.3-0\apache2\htdocs\day7\ex\delete.php on line 10