Added register page and accounts repo. Switch to color instead of bg image.

src/App/Repositories/AccountsApiRepository.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Net.Http;
+using System.Threading.Tasks;
+using Bit.App.Abstractions;
+using Bit.App.Models.Api;
+
+namespace Bit.App.Repositories
+{
+    public class AccountsApiRepository : BaseApiRepository, IAccountsApiRepository
+    {
+        protected override string ApiRoute => "accounts";
+
+        public virtual async Task<ApiResult> PostRegisterAsync(RegisterRequest requestObj)
+        {
+            var requestMessage = new TokenHttpRequestMessage(requestObj)
+            {
+                Method = HttpMethod.Post,
+                RequestUri = new Uri(Client.BaseAddress, string.Concat(ApiRoute, "/register")),
+            };
+
+            var response = await Client.SendAsync(requestMessage);
+            if(!response.IsSuccessStatusCode)
+            {
+                return await HandleErrorAsync(response);
+            }
+
+            return ApiResult.Success(response.StatusCode);
+        }
+    }
+}