Help me please

[winbotscript]

Hello there,

I got this issue :

Warning: mysqli::mysqli(): (HY000/1045): Access denied for user 'root'@'localhost' (using password: NO) in /home/admin/domain/api/pokemon.php on line 141

Warning: mysqli::prepare(): Couldn't fetch mysqli in /home/admin/domain/api/pokemon.php on line 143

Fatal error: Call to a member function bind_param() on null in /home/admin/domain/api/pokemon.php on line 144

Help me please for resolve this