Added MailController

Inflow.Api/Controllers/MailController.cs

@@ -0,0 +1,30 @@
+using Inflow.Api.Constants;
+using Inflow.Domain.Intefaces.Services;
+using Microsoft.AspNetCore.Mvc;
+
+namespace Inflow.Api.Controllers
+{
+    [Route("api/mail")]
+    [ApiController]
+    public class MailController : Controller
+    {
+        private readonly IEmailSender _emailSender;
+
+        public MailController() { }
+        public MailController(IEmailSender emailSender)
+        {
+            _emailSender = emailSender ?? throw new ArgumentNullException(nameof(emailSender));
+        }
+
+        [HttpPost("register")]
+        public async Task<ActionResult> SendRegisterEmail(string receiverEmail, string? name)
+        {
+            string subject = EmailConfigurations.Subject;
+            string emailBody = EmailConfigurations.RegisterBody.Replace("{recipientName}", name);
+
+            await _emailSender.SendEmail(receiverEmail, subject, emailBody);
+
+            return Ok();
+        }
+    }
+}