如何将API图片链接传递给AsyncImage源

from kivy.uix.image import AsyncImage
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout

class MyBoxLayout(BoxLayout):
    def __init__(self, **kwargs):
        super(MyBoxLayout, self).__init__(**kwargs)
        
        # API图片链接
        image_url = "https://example.com/api/image"
        
        # 创建AsyncImage组件并将API图片链接作为其source属性的值传递
        async_image = AsyncImage(source=image_url)
        
        # 将AsyncImage组件添加到布局中
        self.add_widget(async_image)

class MyApp(App):
    def build(self):
        return MyBoxLayout()

if __name__ == '__main__':
    MyApp().run()