optimize for api instead of smtp

Author: ardalis

src/DevBetterWeb.Infrastructure/Services/Smtp2GoEmailService.cs

@@ -14,6 +14,7 @@ public class Smtp2GoEmailService : IEmailService
   private readonly HttpClient _httpClient;
   public Smtp2GoEmailService(IOptions<AuthMessageSenderOptions> optionsAccessor)
   {
+    Guard.Against.Null(optionsAccessor, nameof(optionsAccessor));
     Guard.Against.Null(optionsAccessor.Value, nameof(optionsAccessor.Value));
     Options = optionsAccessor.Value;
     _httpClient = new HttpClient();

src/DevBetterWeb.Web/appsettings.json

@@ -14,10 +14,10 @@
 	"ApiSettings": {
 		"ApiKey": "[api key string goes here]"
 	},
-	"AuthMessageSenderOptions": {
-		"SmtpServer": "mail.smtp2go.com",
-		"SmtpPort": 587,
-		"ApiKey": "[smtp2go api key goes here]"
+	"ApiMailSenderOptions": {
+		"ApiBaseUrl": "https://api.smtp2go.com/v3/",
+		"ApiKey": "[smtp2go api key goes here]",
+		"Sender": "donotreply@devbetter.com"
 	},
 	"Logging": {
 		"ApplicationInsights": {

tests/DevBetterWeb.Tests/Services/EmailServiceTests/Smtp2GoEmailServiceTests.cs

@@ -14,18 +14,6 @@ public void Constructor_WithNullOptions_ThrowsArgumentNullException()
     Assert.Throws<ArgumentNullException>(() => new Smtp2GoEmailService(null!));
   }
 
-  [Fact]
-  public async Task SendEmailAsync_WithNullSmtpServer_ThrowsException()
-  {
-    var options = new AuthMessageSenderOptions();
-    var service = new Smtp2GoEmailService(Options.Create(options));
-
-    var exception = await Assert.ThrowsAsync<Exception>(() =>
-      service.SendEmailAsync("test@example.com", "Test Subject", "Test Message"));
-
-    Assert.Equal("SMTP Server not set.", exception.Message);
-  }
-
   [Fact]
   public async Task SendEmailAsync_WithNullApiKey_ThrowsException()
   {