Function createMultipartUpload

createMultipartUpload(key: string, contentType: string): Promise<string>
Starts a multipart upload in R2 and returns the provider upload id.
Parameters
- key: string
  Object key in the bucket.
- contentType: string
  MIME type stored on the completed object.
Returns Promise<string>
Upload id from CreateMultipartUpload.
- Defined in lib/r2.ts:208