Added new .devtools script

.devtools/data_generation_scripts/9999_reset_admin_password.php

@@ -0,0 +1,19 @@
+<?php
+
+// This is executed inside DatabaseMigrationService class/context
+
+$db = $this->getDatabaseService()->GetDbConnection();
+
+// Reset the password of the user "admin" to "admin"
+$adminUserRow = $db->users()->where('username', 'admin')->fetch();
+
+if ($adminUserRow == null)
+{
+	$adminUserRow = $db->users()->createRow([
+		'username' => 'admin'
+	]);
+}
+
+$adminUserRow->update([
+	'password' => password_hash('admin', PASSWORD_DEFAULT)
+]);