void setClientAuthoritiesSync(String file, {String password})

Sets the list of authority names that a SecureServer will advertise as accepted when requesting a client certificate from a connecting client.

file is a PEM or PKCS12 file containing the accepted signing authority certificates - the authority names are extracted from the certificates. For PKCS12 files, password is the password for the file. For PEM files, password is ignored.

Source

void setClientAuthoritiesSync(String file, {String password});