Added GetAllUsernames for cleanup in main

Author: PythonHacker24

internal/session/utils.go

@@ -17,3 +17,18 @@ func (s *Session) serializeSessionForRedis() map[string]interface{} {
 		"failed":         s.FailedCount,
 	}
 }
+
+/* returns all the usernames in the manager */
+func (m *Manager) GetAllUsernames() []string {
+	/* thread safety of manager */
+	m.mutex.Lock()
+	defer m.mutex.Unlock()
+
+	/* create and fill slice for usernames */
+	usernames := make([]string, 0, len(m.sessionsMap))
+	for _, session := range m.sessionsMap {
+		usernames = append(usernames, session.Username)
+	}
+
+	return usernames
+}