diff --git a/cache.go b/cache.go
new file mode 100644
index 0000000..95260ab
--- /dev/null
+++ b/cache.go
@@ -0,0 +1,44 @@
+package main
+
+import "sync"
+
+var (
+	mu         sync.RWMutex
+	ChatGroups = make(map[uint32]ChatGroup)
+	Clients    = make(map[uint32]Client)
+	ClientsMap = make(map[uint32]map[uint32]*Client)
+)
+
+func AddGroupToCache(chatGroup *ChatGroup) {
+	mu.Lock()
+	defer mu.Unlock()
+	ChatGroups[chatGroup.Id] = *chatGroup
+	ClientsMap[chatGroup.Id] = make(map[uint32]*Client)
+}
+
+func RemoveGroupFromCache(chatGroup *ChatGroup) {
+	mu.Lock()
+	defer mu.Unlock()
+	delete(ChatGroups, chatGroup.Id)
+	delete(ClientsMap, chatGroup.Id)
+}
+
+func AddUserToCache(client *Client) {
+	mu.Lock()
+	defer mu.Unlock()
+	for _, groupIn := range client.Groups {
+		if clients, ok := ClientsMap[groupIn.Id]; ok {
+			clients[client.Id] = client
+		}
+	}
+}
+
+func RemoveClientFromCache(client *Client) {
+	mu.Lock()
+	defer mu.Unlock()
+	for _, groupIn := range client.Groups {
+		if clients, ok := ClientsMap[groupIn.Id]; ok {
+			delete(clients, client.Id)
+		}
+	}
+}
diff --git a/strcut.go b/strcut.go
new file mode 100644
index 0000000..c748b30
--- /dev/null
+++ b/strcut.go
@@ -0,0 +1,21 @@
+package main
+
+import "github.com/coder/websocket"
+
+type Client struct {
+	Password        string
+	Name            string
+	Pronouns        string
+	Groups          [12]*ChatGroup
+	Connection      *websocket.Conn
+	Id              uint32
+	Color           [3]byte
+	IsAuthenticated bool
+}
+
+type ChatGroup struct {
+	Name    string
+	Members [32]*Client
+	Id      uint32
+	Color   [3]byte
+}
diff --git a/wsServer.go b/wsServer.go
index 95b27e9..da666e6 100644
--- a/wsServer.go
+++ b/wsServer.go
@@ -38,5 +38,7 @@ func ServeConnection(responseWriter http.ResponseWriter, request *http.Request)
 	}
 }
 
-func handleUnauthenticatedMessage() {}
-func handleAuthenticatedMessage()   {}
+func handleUnauthenticatedMessage() {
+	
+}
+func handleAuthenticatedMessage() {}