add client and groups member logic

cache.go

@@ -42,7 +42,7 @@ func CacheGetClientByName(name string) (*Client, error) {
 	return nil, fmt.Errorf("client %s not found", name)
 }
 
-func CacheSetClient(client *Client) {
+func CacheSaveClient(client *Client) {
 	mu.Lock()
 	defer mu.Unlock()
 
@@ -56,7 +56,12 @@ func CacheDeleteClient(id uint32) {
 	delete(CacheClients, id)
 }
 
-func CacheSetGroup() {}
+func CacheSaveGroup(group *Group) {
+	mu.Lock()
+	defer mu.Unlock()
+
+	Groups[group.Id] = group
+}
 
 func CacheGetGroup(id uint32) (*Group, error) {
 	mu.RLock()