Why my script php get that error of “PDO”?

I migrated hosting and my system in php crashed!

I upload the site files, imported the database and it is giving this message here, which shows my database user and password database !!! What do I do to fix this?

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[28000] [1045] Access denied for user '********'@'localhost' (using password: YES)' in /var/sentora/hostdata/zadmin/public_html/meusite_com_br/painel/include/PDO/pdopaginator.inc.php:16 Stack trace: #0 /var/sentora/hostdata/zadmin/public_html/meusite_com_br_com_br/painel/include/PDO/pdopaginator.inc.php(16): PDO->__construct('mysql:host=loca...', '***********', '*****************', NULL) #1 /var/sentora/hostdata/zadmin/public_html/meusite_com_br/painel/include/class.connection.inc.php(30): PDOPaginator->__construct('mysql:host=loca...', '************', '************') #2 /var/sentora/hostdata/zadmin/public_html/meusite_com_br/painel/global.php(29): connection->connect() #3 /var/sentora/hostdata/zadmin/public_html/meusite_com_br/index.php(4): require('/var/sentora/ho...') #4 {main} thrown in /var/sentora/hostdata/zadmin/public_html/meusite_com_br/painel/include/PDO/pdopaginator.inc.php on line 16