Hello I got problem like this below. What i did only transfered all files with filezilla to other server and made changes in sites/default/config.php

'driver' => 'mysql',
'host' => '10...',
'database' => 'db12...',
'username' => 'db1228815_master2',
'password' => '...',

Fatal error: Uncaught exception 'PDOException' with message 'SQLSTATE[28000] [1045] Access denied for user 'db1228815_master2'@'h2-lsh12' (using password: YES)' in ...

is there needed change any other files or something is wrong cause in this error user is called 'db1228815_master2'@'h2-lsh12'

what should i do ?
I dont want make new installation cause I made couple of changes