[Feat]: Include new FedEx MFA API methods

[TGKN]

Feature Request Is New

• I have verified that the requested feature does not already exist or has not already been requested.

Description of the feature

Hi,
According to this article in the easypost docs FedEx will soon require MFA for registering their accounts
https://support.easypost.com/hc/en-us/articles/35262738410253-FedEx-Multi-Factor-Authentication
I checked the easypost nuget package (.Net) but I could not find any of the methods to do the MFA registration for FedEx in there. The methods missing are:

1. Pin creation and Validation
   https://api.easypost.com/v2/fedex_registrations/FEDEX_ACCOUNT_NUMBER/pin
   https://api.easypost.com/v2/fedex_registrations/FEDEX_ACCOUNT_NUMBER/pin/validate
2. Address Validation
   https://api.easypost.com/v2/fedex_registrations/FEDEX_ACCOUNT_NUMBER/address
3. Invoice Validation
   https://api.easypost.com/v2/fedex_registrations/FEDEX_ACCOUNT_NUMBER/invoice

Am I just not seeing those or are they not implemented, yet? If they are not implemented yet, is there a timeline when they will be?
Thanks
Kai

[Justintime50]

Hey TGKN, it's not yet implemented. As FedEx will soon require this, adding these is something we hope to do in the next couple weeks.

[Justintime50]

Through the power of AI, a couple weeks really meant a couple days! #649 will add this feature.

[TGKN]

Hey,
Awesome, thanks for this.
Kai