Uploads a file with a sticker; returns the uploaded file
| user_id |
Sticker file owner; ignored for regular users |
| sticker_format |
Sticker format |
| sticker |
File file to upload; must fit in a 512x512 square. For WEBP stickers the file must be in WEBP or PNG format, which will be converted to WEBP server-side. See https://core.telegram.org/animated_stickers#technical-requirements for technical requirements |