Changes to Connect an existing carrier account using OAuth 2.0

get/carrier_accounts/{CarrierAccountObjectId}/signin/initiate

Oct 28, 20260eab5a94b0c3 Revision changes
- info
  added the new optional header request parameter SHIPPO-ACCOUNT-ID
Jul 12, 20267e1ec201b515 Revision changes
- breaking
  for the header request parameter SHIPPO-API-VERSION, default value 2018-02-08 was added