Description: Pre-shared key (passphrase) to be used if authentication type in 'hm2VpnConnIkeAuthType' is 'psk'. The pre-shared key sequence cannot contain newline or double-quote characters. Alternatively to characters sequence, pre-shared secrets can be represented as hexadecimal or Base64 encoded binary values. A character sequence beginning with 0x is interpreted as sequence hexadecimal digits. Similarly, a character sequence beginning with 0s is interpreted as Base64 encoded binary data.