how do i sign into my icloud photo library?
['On your iPhone, iPad, or iPod touch, go to Settings > [your name] > iCloud > Photos, then turn on iCloud Photos.', 'On your Mac, go to System Preferences > Apple ID. ... ', 'On Apple TV 4K and Apple TV HD, go to Settings > Users and Accounts > iCloud. ... ', 'On your Windows PC, follow these steps.']