Refactor caching

Expedience.Infrastructure/ExpedienceRepository.cs

@@ -25,18 +25,12 @@ namespace Expedience.Infrastructure
         public async Task<List<DutyCompletionRecord>> GetDutyCompletionRecords(string expac, CancellationToken cancellationToken)
         {
             var cacheKey = $"xpd-dcr-{expac}";
-            if (_memcachedClient.TryGet<List<DutyCompletionRecord>>(cacheKey, out var cachedValue))
-            {
-                return cachedValue;
-            }
-            else
-            {
-                var records = await _dbContext.DutyCompletionRecords.FromSqlInterpolated($"SELECT * FROM public.get_dutycompletionrecords({expac})")
-                    .ToListAsync();
-                await _memcachedClient.AddAsync(cacheKey, records, TimeSpan.FromMinutes(10));
-                
-                return records;
-            }
+            var cacheSeconds = 600;
+            var records = await _memcachedClient.GetValueOrCreateAsync(cacheKey, cacheSeconds,
+                async () => await _dbContext.DutyCompletionRecords.FromSqlInterpolated($"SELECT * FROM public.get_dutycompletionrecords({expac})")
+                    .ToListAsync());
+
+            return records;
         }
 
         public void Dispose()