Where/how do I put User Secrets on Azure?

Question

I have a Blazor server side web app. I've pushed it up to Azure app service. To run it I need to give it access to the secrets I've got in a json file on my computer.

Where/how do I push these up to Azure so that the app service can provide them to my application?

I'm guessing I'm asking wrong, but what I've found via search is not telling me how to transfer these settings over.

And if the answer is place it in the app service configuration part - that's key value pairs. So how do I handle:

"Twilio": {
    "VerifyApiKey": "abc",
    "AccountSID": "def",
    "AuthToken": "ghi"
  },