Drush is the command line shell and Unix scripting interface for Drupal. The most common way to install Drush is to install it on a per-project basis using Composer. We'll walk through the steps to do that, as well as how to set up the Drush Launcher tool (to make it possible to execute Drush commands without having to specify a full path to the executable).
It is necessary to debug production bug with specific user or role, for that we need password but it is production database the client will not give you the password also you can't reset it. What will be the solution to debug ? drush uli