Our UPS integration stopped working a couple weeks ago due to UPS disabling support for the old UPS Type connection in Magento 2.4.3. We are trying to get an alternate XML integration working but it requires an Access License Number (access key) and as of today, UPS no longer supports access keys, they require OAuth connection: https://www.ups.com/upsdeveloperkit
We can't get an access key, and it looks like access keys aren't supported anymore anyway.
How are Magento 2 websites recommended to connect to UPS going forward? We have an App created with OAuth included. We just can't get the app to work in the default M2 configuration, as the default configuration doesn't allow for OAuth Client ID and Client Secret field inputs.
Need quick help here, as our website cannot process orders without UPS shipping rates.