Update Shipping Module for Carriers

I need to update an existing shipping module to accommodate recent changes made by UPS, USPS, and FedEx. These carriers have altered their authentication methods for receiving quotes, and I require assistance in obtaining the new authentication details.

Key Requirements:
- Update the module to reflect changes in authentication methods for UPS, USPS, and FedEx.
- Assist in obtaining the new authentication details from the carriers.

Ideal Skills and Experience:
- Experience with shipping modules and integration with UPS, USPS, and FedEx.
- Familiarity with authentication methods and API changes.
- Ability to troubleshoot and fix any issues that arise during the update process.