The username and password for cPanel are the same for both FTP login and MySQL database access. So the change of username or password affects to all of them. But created FTP or Database users or email accounts by you will not be affected.
The username and password for cPanel are the same for both FTP login and MySQL database access. So the change of username or password affects to all of them. But created FTP or Database users or email accounts by you will not be affected.