Add Google Photos (#2801)

README.md

@@ -1247,6 +1247,7 @@ API | Description | Auth | HTTPS | CORS |
 | [Getty Images](http://developers.gettyimages.com/en/) | Build applications using the world's most powerful imagery | `OAuth` | Yes | Unknown |
 | [Gfycat](https://developers.gfycat.com/api/) | Jiffier GIFs | `OAuth` | Yes | Unknown |
 | [Giphy](https://developers.giphy.com/docs/) | Get all your gifs | `apiKey` | Yes | Unknown |
+| [Google Photos](https://developers.google.com/photos) | Integrate Google Photos with your apps or devices | `OAuth` | Yes | Unknown |
 | [Gyazo](https://gyazo.com/api/docs) | Upload images | `apiKey` | Yes | Unknown |
 | [Imgur](https://apidocs.imgur.com/) | Images | `OAuth` | Yes | Unknown |
 | [Imsea](https://imsea.herokuapp.com/) | Free image search | No | Yes | Unknown |