[Koha] Koha 18.04 problem

[ramakant at iitk.ac.in]

Dear sir,

I am facing the below error while launch koha client. which is installed
in ubuntu 18.04.How to resolve the problem.

Software error:

DBIx::Class::Storage::DBI::catch {...} (): DBI Connection failed: Access
denied for user 'koha_library'@'localhost' (using password: YES) at
/usr/share/perl5/DBIx/Class/Storage/DBI.pm line 1520. at
/usr/share/koha/lib/Koha/Database.pm line 107

For help, please send mail to the webmaster ([no address given]), giving
this error message and the time and date of the error.


Regards,

==============
Ramakant