code: public void storePassword(String account, CharSequence password) {
  		ByteBuffer pwBuf = UTF_8.encode(CharBuffer.wrap(password));
  		byte[] pwBytes = new byte[pwBuf.remaining()];
  		pwBuf.get(pwBytes);
  		int errorCode = storePassword0(account.getBytes(UTF_8), pwBytes);
  		Arrays.fill(pwBytes, (byte) 0x00);
  		Arrays.fill(pwBuf.array(), (byte) 0x00);
  		if (errorCode != OSSTATUS_SUCCESS) {
  			throw new JniException("Failed to store password. Error code " + errorCode);
  		}
  	}
docs: Associates the specified password with the specified key in the system keychain.
  
  @param account Unique account identifier
  @param password Passphrase to store