errors
errors: object
storage/invalid-size
storage/invalid-size: string = "The file is too big."
storage/invalid-type
storage/invalid-type: string = "The file format is not supported."
storage/invalid-upload
storage/invalid-upload: string = "Invalid upload resource."
storage/no-edit
storage/no-edit: string = "No EDIT permission."
storage/no-file
storage/no-file: string = "File not found (no VIEW permission or trashed)."
delete a file