Add webhook

src/Managing.Api/Controllers/UserController.cs

@@ -87,5 +87,18 @@ public class UserController : BaseController
         var updatedUser = await _userService.UpdateAvatarUrl(user, avatarUrl);
         return Ok(updatedUser);
     }
+
+    /// <summary>
+    /// Updates the Telegram channel for the current user.
+    /// </summary>
+    /// <param name="telegramChannel">The new Telegram channel to set.</param>
+    /// <returns>The updated user with the new Telegram channel.</returns>
+    [HttpPut("telegram-channel")]
+    public async Task<ActionResult<User>> UpdateTelegramChannel([FromBody] string telegramChannel)
+    {
+        var user = await GetUser();
+        var updatedUser = await _userService.UpdateTelegramChannel(user, telegramChannel);
+        return Ok(updatedUser);
+    }
 }