Corrected an unwanted mutex copy in 5-session-cleaner

5-session-cleaner/main.go

@@ -35,7 +35,7 @@ type SessionManager struct {
 type Session struct {
 	Data  map[string]interface{}
 	timer *time.Timer
-	mu    sync.Mutex
+	mu    *sync.Mutex
 }
 
 // NewSessionManager creates a new sessionManager
@@ -66,6 +66,7 @@ func (m *SessionManager) CreateSession() (string, error) {
 		timer: time.AfterFunc(5*time.Second, func() {
 			m.CleanSession(sessionID)
 		}),
+		mu: &sync.Mutex{},
 	}
 	m.rwmu.Unlock()