void addUser(String username, char[] saltedPasswordHash)
			throws DuplicateNameException, IOException {
		if (saltedPasswordHash == null && enableLocalPasswords) {
			saltedPasswordHash = getDefaultPasswordHash();
		}
		addUser(username, saltedPasswordHash, null);
	}
Add a user with optional salted password hash.
@param username user name/SID
@param saltedPasswordHash optional user password hash (may be null)
@throws DuplicateNameException if username already exists
@throws IOException if IO error occurs
Ghidra/Features/GhidraServer/src/main/java/ghidra/server/UserManager.java