Fix some nullref errors

ReplayBrowser/Helpers/ReplayHelper.cs

@@ -37,7 +37,7 @@ public async Task<List<Replay>> GetMostRecentReplays(AuthenticationState state)
 
         var caller = AccountHelper.GetAccountGuid(state);
         replays = FilterReplays(replays, caller);
-        var account = _accountService.GetAccount(state);
+        var account = await _accountService.GetAccount(state);
 
         await _accountService.AddHistory(account, new HistoryEntry()
         {
@@ -51,7 +51,7 @@ public async Task<List<Replay>> GetMostRecentReplays(AuthenticationState state)
 
     public async Task<CollectedPlayerData?> GetPlayerProfile(Guid playerGuid, AuthenticationState authenticationState)
     {
-        var accountCaller = _accountService.GetAccount(authenticationState);
+        var accountCaller = await _accountService.GetAccount(authenticationState);
 
         var accountRequested = _accountService.GetAccountSettings(playerGuid);
 
@@ -244,7 +244,7 @@ public async Task<int> GetTotalReplayCount()
         if (replay == null) 
             return null;
 
-        var caller = _accountService.GetAccount(authstate);
+        var caller = await _accountService.GetAccount(authstate);
         replay = FilterReplay(replay, caller);
         return replay;
     }
@@ -281,7 +281,7 @@ private Replay FilterReplay(Replay replay, Account? caller = null)
 
     public async Task<SearchResult> SearchReplays(SearchMode searchMode, string query, int page, AuthenticationState authenticationState)
     {
-        var callerAccount = _accountService.GetAccount(authenticationState);
+        var callerAccount = await _accountService.GetAccount(authenticationState);
 
         switch (searchMode)
         {

ReplayBrowser/Pages/Account/Logs.razor

@@ -128,7 +128,7 @@ else
         }
 
         var authState = await AuthenticationStateProvider.GetAuthenticationStateAsync();
-        var account = AccountService.GetAccount(authState);
+        var account = await AccountService.GetAccount(authState);
         if (account == null || !account.IsAdmin)
         {
             Is1984 = true;

ReplayBrowser/Pages/Account/Manage.razor

@@ -15,7 +15,7 @@
 @if(ErrorMessage != null)
 {
     <div class="alert alert-danger" role="alert">
-        Failed to save changes:
+        Error:
         @ErrorMessage
     </div>
 }
@@ -68,7 +68,13 @@ else
     protected override async Task OnInitializedAsync()
     {
         var authState = await AuthenticationStateProvider.GetAuthenticationStateAsync();
-        account = AccountService.GetAccount(authState);
+        account = await AccountService.GetAccount(authState);
+
+        if (account == null)
+        {
+            ErrorMessage = "Account not found, please go to the home page and then try again. How did you get here?";
+            return;
+        }
 
         var uri = new Uri(NavigationManager.Uri);
         var query = uri.Query;

ReplayBrowser/Services/AccountService.cs

@@ -16,13 +16,15 @@ public class AccountService : IHostedService, IDisposable
 {
     private readonly IMemoryCache _cache;
     private readonly IServiceScopeFactory _scopeFactory;
+    private readonly Ss14ApiHelper _apiHelper;
 
     private bool _settingsGenerated = false;
 
-    public AccountService(IMemoryCache cache, IServiceScopeFactory scopeFactory)
+    public AccountService(IMemoryCache cache, IServiceScopeFactory scopeFactory, Ss14ApiHelper apiHelper)
     {
         _cache = cache;
         _scopeFactory = scopeFactory;
+        _apiHelper = apiHelper;
     }
 
     public Task StartAsync(CancellationToken cancellationToken)
@@ -77,15 +79,36 @@ public void Dispose()
         _cache.Dispose();
     }
 
-    public Account? GetAccount(AuthenticationState authstate)
+    public async Task<Account>? GetAccount(AuthenticationState authstate)
     {
         var guid = AccountHelper.GetAccountGuid(authstate);
         using var scope = _scopeFactory.CreateScope();
         var context = scope.ServiceProvider.GetRequiredService<ReplayDbContext>();
-        return context.Accounts
+        var account = context.Accounts
             .Include(a => a.Settings)
             .Include(a => a.History)
             .FirstOrDefault(a => a.Guid == guid);
+
+        if (account == null)
+        {
+            if (guid == null)
+            {
+                return null;
+            }
+
+            // If the account doesn't exist, we need to create it.
+            account = new Account()
+            {
+                Guid = (Guid)guid,
+                Username = (await _apiHelper.FetchPlayerDataFromGuid((Guid)guid)).Username,
+                Settings = new AccountSettings()
+            };
+
+            context.Accounts.Add(account);
+            await context.SaveChangesAsync();
+        }
+
+        return account;
     }
 
     public async Task UpdateAccount(Account? account)

ReplayBrowser/Services/LeaderboardService.cs

@@ -144,10 +144,10 @@ public async Task<LeaderboardData> GetLeaderboard(RangeOption rangeOption, strin
     {
         var context = _scopeFactory.CreateScope().ServiceProvider.GetRequiredService<ReplayDbContext>();
 
-        var accountCaller = _accountService.GetAccount(authenticationState);
-
+        Account? accountCaller = null;
         if (logAction)
         {
+            accountCaller = await _accountService.GetAccount(authenticationState);
             await _accountService.AddHistory(accountCaller, new HistoryEntry()
             {
                 Action = Enum.GetName(typeof(Action), Action.LeaderboardViewed) ?? "Unknown",
@@ -156,7 +156,7 @@ public async Task<LeaderboardData> GetLeaderboard(RangeOption rangeOption, strin
             });
         }
 
-        if (username != null)
+        if (username != null && accountCaller != null)
         {
             var accountRequested = await context.Accounts
                 .Include(a => a.Settings)