How to use the feeluown.controller_api.ControllerApi.api function in feeluown

self.username_label = QLabel()
        self.password_label = QLabel()
        self.hint_label = QLabel()
        self.username_widget = QLineEdit()
        self.password_widget = QLineEdit()
        self.login_btn = QPushButton()

        self.captcha_label = QLabel()
        self.captcha_lineedit = QLineEdit()

        self.layout = QVBoxLayout()
        self.is_remember_chb = QCheckBox(u'记住账号')

        self.nm = NetworkManager()

        self.ne = ControllerApi.api

        self.is_autofill = False
        self.is_need_captcha = False
        self.captcha_id = 0
        self.user_data = 0

        self.__set_signal_binding()
        self.__set_widgets_prop()
        self.__set_layouts_prop()
        self.__set_me()
        self.fill_content()

def set_playlists_options(self):
        playlists = ControllerApi.api.get_user_playlist()
        if not ControllerApi.api.is_response_ok(playlists):
            return
        self.playlists = playlists
        self.menu.clear()
        for playlist in playlists:
            if ControllerApi.api.is_playlist_mine(playlist):
                name = playlist['name']
                pid = playlist['id']
                action = QAction(name, self)
                action.triggered.connect(partial(self.add_to_playlist, pid))
                self.menu.addAction(action)

def set_playlist_item(self, playlist_model):
        self.data = playlist_model
        if ControllerApi.api.is_favorite_playlist(playlist_model):
            self._icon_label.setObjectName('playlist_img_favorite')
        else:
            self._icon_label.setObjectName('playlist_img_mine')

        metrics = QFontMetrics(self._text_btn.font())
        text = metrics.elidedText(playlist_model['name'], Qt.ElideRight,
                                  self._text_btn.width()-40)
        self._text_btn.setText(text)

def play_mv_by_mvid(cls, mvid):
        mv_model = ControllerApi.api.get_mv_detail(mvid)
        if not ControllerApi.api.is_response_ok(mv_model):
            return

        url_middle = mv_model['url_middle']
        clipboard = QApplication.clipboard()
        clipboard.setText(url_middle)

        cls.view.ui.STATUS_BAR.showMessage(
                u"程序已经将视频的播放地址复制到剪切板", 5000)
        if platform.system() == "Linux":
            ControllerApi.player.pause()
            ControllerApi.notify_widget.show_message(
                    "通知", "正在尝试调用VLC视频播放器播放MV")
            try:
                subprocess.Popen(['vlc', url_middle, '--play-and-exit', '-f'])
            except:

def get_songs(cls):
        songs = ControllerApi.api.get_radio_songs()
        return songs if songs else []

def show_lyric_while_visible(self, ms):
        """给controller调用的函数"""
        if self.isVisible():
            if self.has_lyric():
                self.sync_lyric(ms)
            else:
                lyric_model = ControllerApi.api.get_lyric_detail(ControllerApi.state['current_mid'])
                if not ControllerApi.api.is_response_ok(lyric_model):
                    return

                if lyric_model:
                    self.set_lyric(lyric_model)
                    self.sync_lyric(ms)
                else:
                    self.setText(u'歌曲没有歌词')

def play_specific_song_by_mid(cls, mid):
        song = ControllerApi.api.get_song_detail(mid)
        if not ControllerApi.api.is_response_ok(song):
            return False

        ControllerApi.player.play(song)
        return True

def get_songs(cls):
        if ControllerApi.state['current_mid'] == 0:
            ControllerApi.notify_widget.show_message("O.o", "无法寻找相似歌曲")
            return []
        songs = ControllerApi.api.get_simi_songs(ControllerApi.state['current_mid'])
        return songs if songs else []