Allowing the User to be constructed without a CacheContainer

Author: StanleyGoldman

src/GitHub.Api/Git/Repository.cs

@@ -423,9 +423,12 @@ public class User : IUser
 
         public User(ICacheContainer cacheContainer)
         {
-            this.cacheContainer = cacheContainer;
-            cacheContainer.CacheInvalidated += (type) => { if (type == CacheType.GitUser) GitUserCacheOnCacheInvalidated(); };
-            cacheContainer.CacheUpdated += (type, dt) => { if (type == CacheType.GitUser) CacheHasBeenUpdated(dt); };
+            if (cacheContainer != null)
+            {
+                this.cacheContainer = cacheContainer;
+                cacheContainer.CacheInvalidated += (type) => { if (type == CacheType.GitUser) GitUserCacheOnCacheInvalidated(); };
+                cacheContainer.CacheUpdated += (type, dt) => { if (type == CacheType.GitUser) CacheHasBeenUpdated(dt); };
+            }
         }
 
         public void CheckAndRaiseEventsIfCacheNewer(CacheType cacheType, CacheUpdateEvent cacheUpdateEvent) => cacheContainer.CheckAndRaiseEventsIfCacheNewer(CacheType.GitUser, cacheUpdateEvent);