[Koha] password for web interface

Hello, We have installed koha on a debian server. All was fine but we cannot connect on the web interface (opac as well as koha). Which login and password should we use to connect both interfaces ? Is it the mysql password for koha database or do we have to introduce a new user in the database (users table) ? Or is it something else ? Thanks for help. Violaine Louvet. -- Violaine Louvet. MAPLY (Maths Appliquees de Lyon-UMR 5585 CNRS). Univ. Lyon I,43 Bd du 11 Novembre 1918 69622 - Villeurbanne Cedex - France. +33(0)4 7244 8523