[Koha] upgraded from koha 3.0 to 3.2 but unable to run

i am getting following errors after upgraded from koha 3.0 to 3.2 Access denied for user 'kohaadmin'@'localhost' to database 'koha' at /usr/share/koha/lib/C4/Context.pm line 692. Compilation failed in require at /usr/share/koha/lib/C4/Auth.pm line 33. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Auth.pm line 33. Compilation failed in require at /usr/share/koha/opac/cgi-bin/opac/opac-main.pl line 22. BEGIN failed--compilation aborted at /usr/share/koha/opac/cgi-bin/opac/opac-main.pl line 22.