rename session manager functions

src/session/session_manager.go

@@ -23,18 +23,22 @@ const (
 	InMemory StoreType = iota
 )
 
-func CreateSessionManager(storeType StoreType) *SessionManager {
+func GetSessionManager() *SessionManager {
 	once.Do(func() {
 		instance = &SessionManager{}
+	})
+	return instance
+}
+
+func (manager *SessionManager) SetStoreType(storeType StoreType) {
+	logging.Infof("Changing session manager store type")
 	switch storeType {
 	case InMemory:
 		{
-				instance.store = NewMemoryStore()
+			manager.store = NewMemoryStore()
 			break
 		}
 	}
-	})
-	return instance
 }
 
 func (manager *SessionManager) CreateSession(userID string) (cookie *http.Cookie, err error) {