From https://once.com/writebook

script/admin/reset-password

@@ -0,0 +1,13 @@
+#!/usr/bin/env ruby
+require File.expand_path("../../config/environment", File.dirname(__FILE__))
+
+abort "Usage: #{$0} <email-address> <password>" unless ARGV.length == 2
+
+email_address, password = ARGV
+if user = User.find_by(email_address: email_address)
+  user.update!(password: password)
+  puts "Password has been reset"
+else
+  puts "User not found"
+  exit -1
+end