def authentication_key_set(enctype, pw)
      state = pw.empty? ? 'no' : ''
      enctype = pw.empty? ? '' : Encryption.symbol_to_cli(enctype)
      set_args_keys(state: state, enctype: enctype, password: pw)
      config_set('ospf_area_vlink', 'authentication_key_set', @set_args)
    end
def authentication_key_set(enctype, pw)
      state = pw.empty? ? 'no' : ''
      enctype = pw.empty? ? '' : Encryption.symbol_to_cli(enctype)
      set_args_keys(state: state, enctype: enctype, password: pw)
      config_set('ospf_area_vlink', 'authentication_key_set', @set_args)
    end
example CLI:
 authentication-key 3 3109a60f51374a0d
 To remove the authentication-key altogether,
 set the password to empty string