Unable to Edit config.inc.php

Running: macOS High Sierra Version 10.13.3, zsh w/ iTerm2

Trying to set up a local environment with xampp, which has worked just fine for me in the past. However, I'm now unable to access phpmyadmin after changing the root password via the phpmyadmin UI.

The tutorial I am following (which suggested doing this) pointed me to the config.inc.php file, where the password variable would also need to be updated. Unfortunately, I am unable to edit this file. I've seen other users in Stack Overflow complain of the same issue, but the answer that comes back always seems to involve editing via vi or nano, which doesn't work for me either. Here's an example of what happens when using nano.

I open file via nano

sudo nano config.inc.php

My terminal then prompts me for the system password.

Once in nano, I navigate to the password variable and enter it:

$cfg['Servers'][$i]['password'] = '[mypassword]';

I then attempt to save using ctrl+O, where I'm prompted:

File Name to Write: config.inc.php

and then after hitting ENTER receive the error from nano:

Error writing config.inc.php: Permission denied

I've also tried to editing the file via Sublime Text 3, where my machine prompts me to enter the user password. I receive no error message after doing that, but still cannot access phpmyadmin. I am unable to use chmod to edit permissions on the file, and restarting the mysql server after editing the config.inc.php file also does not work.

Why is nano throwing the "permission denied" error even after I've entered my system password?

Thanks!

I was able to resolve this by accessing the config.inc.php file via the terminal provided by xampp.