realised the user can just set the region..delete time

src/Ocelot/Cache/RegionBuilder.cs

@@ -12,9 +12,9 @@ namespace Ocelot.Cache
     {
         public string Region(ReRoute reRoute)
         {
-            var methods = string.Join(",", reRoute.UpstreamHttpMethod.Select(m => m.Method));
+            var methods = string.Join("", reRoute.UpstreamHttpMethod.Select(m => m.Method));
 
-            var region = $"{methods} {reRoute.UpstreamPathTemplate.Value}";
+            var region = $"{methods}{reRoute.UpstreamPathTemplate.Value.Replace("/", "")}";
             
             return region;
         }

src/Ocelot/Cache/Regions.cs

@@ -0,0 +1,13 @@
+using System.Collections.Generic;
+
+namespace Ocelot.Cache
+{
+    public class Regions
+    {
+        public Regions(List<string> value)
+        {
+            Value = value;
+        }
+        public List<string> Value {get;private set;}
+    }
+}

src/Ocelot/Configuration/CacheOptions.cs

@@ -8,5 +8,6 @@
         }
 
         public int TtlSeconds { get; private set; }
+        public string Region {get;private set;}
     }
 }

src/Ocelot/Configuration/File/FileCacheOptions.cs

@@ -3,5 +3,6 @@
     public class FileCacheOptions
     {
         public int TtlSeconds { get; set; }
+        public string Region {get;private set;}
     }
 }

src/Ocelot/Controllers/OutputCacheController.cs

@@ -1,4 +1,5 @@
 using System.Net.Http;
+using System.Threading.Tasks;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Ocelot.Cache;
@@ -20,10 +21,10 @@ namespace Ocelot.Controllers
         }
 
         [HttpGet]
-        public IActionResult Get()
+        public async Task<IActionResult> Get()
         {
-            var regions = _regionsGetter.Regions();
-            return new OkObjectResult(regions);
+            var regions = await _regionsGetter.Regions();
+            return new OkObjectResult(new Regions(regions));
         }
 
         [HttpDelete]