Uploads a file to an employee's file section. The request must be a multipart/form-data POST. On success, a Location header is returned with the URL of the newly created file resource. The file must be under 20MB and use a supported extension. Pass 0 as the employee ID to use the employee associated with the API key. Employees may upload to their own folder if the company has employee document uploads enabled.
201The file was uploaded successfully. The Location header contains the URL of the new file resource.
400The request is invalid: missing file name, missing file, zero-byte file, or unsupported file extension.
403The API user does not have permission to access the requested employee or their file section.
404The employee or the specified file category was not found.
413The file exceeds the 20MB limit or the company's storage limit.
503The file storage API is temporarily unavailable.
