This method saves the currently selected public certificate to a file.
async certmgr.saveCertificate(fileName : string): Promise<void>
Note: This method is present for backwards compatibility. It is recommended to use ExportCertificate to export both public and private certificates and keys.
This method saves the public certificate of the currently selected certificate in PEM (Base64) format to the location specified by the FileName parameter.
If the destination file exists it is overwritten.