feat: implement auth local cache. (#3533)

* feat: add auth local cache.

* feat: implement auth local cache.

* feat: improve auth localcache.

pkg/common/convert/auth.go

@@ -0,0 +1,25 @@
+package convert
+
+func TokenMapDB2Pb(tokenMapDB map[string]int) map[string]int32 {
+    if tokenMapDB == nil {
+        return nil
+    }
+    
+    tokenMapPB := make(map[string]int32, len(tokenMapDB))
+    for k, v := range tokenMapDB {
+        tokenMapPB[k] = int32(v)
+    }
+    return tokenMapPB
+}
+
+func TokenMapPb2DB(tokenMapPB map[string]int32) map[string]int {
+    if tokenMapPB == nil {
+        return nil
+    }
+    
+    tokenMapDB := make(map[string]int, len(tokenMapPB))
+    for k, v := range tokenMapPB {
+        tokenMapDB[k] = int(v)
+    }
+    return tokenMapDB
+}