clear push token on unregister

src/App/Abstractions/Repositories/IDeviceApiRepository.cs

@@ -9,5 +9,6 @@ namespace Bit.App.Abstractions
     public interface IDeviceApiRepository : IApiRepository<DeviceRequest, DeviceResponse, string>
     {
         Task<ApiResult<DeviceResponse>> PutTokenAsync(string identifier, DeviceTokenRequest request);
+        Task<ApiResult<DeviceResponse>> PutClearTokenAsync(string identifier);
     }
 }

src/App/Repositories/DeviceApiRepository.cs

@@ -42,5 +42,32 @@ namespace Bit.App.Repositories
                 return ApiResult<DeviceResponse>.Success(responseObj, response.StatusCode);
             }
         }
+
+        public virtual async Task<ApiResult<DeviceResponse>> PutClearTokenAsync(string identifier)
+        {
+            if(!Connectivity.IsConnected)
+            {
+                return HandledNotConnected<DeviceResponse>();
+            }
+
+            using(var client = new ApiHttpClient())
+            {
+                var requestMessage = new TokenHttpRequestMessage
+                {
+                    Method = HttpMethod.Put,
+                    RequestUri = new Uri(client.BaseAddress, string.Concat(ApiRoute, "/identifier/", identifier, "/clear-token")),
+                };
+
+                var response = await client.SendAsync(requestMessage);
+                if(!response.IsSuccessStatusCode)
+                {
+                    return await HandleErrorAsync<DeviceResponse>(response);
+                }
+
+                var responseContent = await response.Content.ReadAsStringAsync();
+                var responseObj = JsonConvert.DeserializeObject<DeviceResponse>(responseContent);
+                return ApiResult<DeviceResponse>.Success(responseObj, response.StatusCode);
+            }
+        }
     }
 }

src/App/Services/PushNotificationListener.cs

@@ -95,10 +95,11 @@ namespace Bit.App.Services
             }
         }
 
-        public void OnUnregistered(DeviceType deviceType)
+        public async void OnUnregistered(DeviceType deviceType)
         {
             Debug.WriteLine("Push Notification - Device Unnregistered");
             _settings.Remove(Constants.PushLastRegistrationDate);
+            await _deviceApiRepository.PutClearTokenAsync(_appIdService.AppId);
         }
 
         public void OnError(string message, DeviceType deviceType)

src/App/Utilities/TokenHttpRequestMessage.cs

@@ -12,7 +12,10 @@ namespace Bit.App
         {
             var authService = Resolver.Resolve<IAuthService>();
             var appIdService = Resolver.Resolve<IAppIdService>();
-            Headers.Add("Authorization", $"Bearer {authService.Token}");
+            if(authService.IsAuthenticated)
+            {
+                Headers.Add("Authorization", $"Bearer {authService.Token}");
+            }
             if(!string.IsNullOrWhiteSpace(appIdService.AppId))
             {
                 Headers.Add("DeviceIdentifier", appIdService.AppId);