[PM-25183] Update the BitPay purchasing procedure (#6396)

* Revise BitPay controller

* Run dotnet format

* Kyle's feedback

* Run dotnet format

* Temporary logging

* Whoops

* Undo temporary logging

src/Api/Controllers/MiscController.cs

@@ -1,45 +0,0 @@
-using Bit.Api.Models.Request;
-using Bit.Core.Settings;
-using Bit.Core.Utilities;
-using Microsoft.AspNetCore.Authorization;
-using Microsoft.AspNetCore.Mvc;
-using Stripe;
-
-namespace Bit.Api.Controllers;
-
-public class MiscController : Controller
-{
-    private readonly BitPayClient _bitPayClient;
-    private readonly GlobalSettings _globalSettings;
-
-    public MiscController(
-        BitPayClient bitPayClient,
-        GlobalSettings globalSettings)
-    {
-        _bitPayClient = bitPayClient;
-        _globalSettings = globalSettings;
-    }
-
-    [Authorize("Application")]
-    [HttpPost("~/bitpay-invoice")]
-    [SelfHosted(NotSelfHostedOnly = true)]
-    public async Task<string> PostBitPayInvoice([FromBody] BitPayInvoiceRequestModel model)
-    {
-        var invoice = await _bitPayClient.CreateInvoiceAsync(model.ToBitpayInvoice(_globalSettings));
-        return invoice.Url;
-    }
-
-    [Authorize("Application")]
-    [HttpPost("~/setup-payment")]
-    [SelfHosted(NotSelfHostedOnly = true)]
-    public async Task<string> PostSetupPayment()
-    {
-        var options = new SetupIntentCreateOptions
-        {
-            Usage = "off_session"
-        };
-        var service = new SetupIntentService();
-        var setupIntent = await service.CreateAsync(options);
-        return setupIntent.ClientSecret;
-    }
-}