Error When Adding Handler

Problem/Motivation

When adding the handler for the first time, the following error message is displayed: "Warning: Undefined array key 'password'".

Steps to reproduce

1. Navigate to webform_id settings
2. Select Emails / Handlers
3. Add Handler

Proposed resolution

Mark the Settings "Password" field as mandatory and add a check to verify if the "password" key exists in the array before accessing it.

Remaining tasks

Prevent the warning from being triggered, for example

if (isset($array['password'])) {
    // Process password key
} else {
    // Handle missing key appropriately
}

or a similar function to ensure smoother handling of the required key.