nullability fix in IRepository (#66)

Author: enriko-riba

GitVersion.yml

@@ -1,4 +1,4 @@
-next-version: 1.4.0
+next-version: 1.4.1
 mode: ContinuousDelivery
 branches: 
   release:

host/Abstract/IRepository.cs

@@ -22,7 +22,7 @@ public interface IRepository
     /// </summary>
     /// <param name="userId"></param>
     /// <returns></returns>
-    Task<User> GetUserAsync(int userId);
+    Task<User?> GetUserAsync(int userId);
 
     /// <summary>
     /// Saves the user to the persistence layer.

reference-game/DummyRepository.cs

@@ -18,9 +18,9 @@ public Task DeleteUserAsync(User user)
             return Task.CompletedTask;
         }
 
-        public Task<User> GetUserAsync(int userId)
+        public Task<User?> GetUserAsync(int userId)
         {
-            return Task.FromResult<User>(playerList[userId]);
+            return Task.FromResult<User?>(playerList[userId]);
         }
 
         public Task<IEnumerable<User>> GetUsers()

reference-game/ReferenceGame.csproj

@@ -4,6 +4,7 @@
     <OutputType>Exe</OutputType>
     <TargetFramework>net9.0</TargetFramework>
     <RootNamespace>MultiplayerHost.ReferenceGame</RootNamespace>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>