Stores the wallet decryption key in memory for 'timeout' seconds.
passphrasestringREQUIREDtimeoutnumberREQUIREDcurl --user myuser --data-binary '{"jsonrpc":"1.0","id":"1","method":"walletpassphrase","params":["my pass phrase",60]}' -H 'content-type:text/plain;' http://127.0.0.1:8332/null