Reset root or admin password of mediawiki

To reset root or admin password of wiki use following steps:

Comment all $wgAuth settings in LocalSettings.php so that wiki only uses local authentication.
Connect to wiki database by looking at database configuration in LocalSettings.php
Look at user_groups table and find user_id of user who is member of bureaucrat and sysop. Look at username of the user with this id in user table.

Use:

php maintenance/changePassword.php --user=<username> --password=<new_password>

where <new_password> must be at least 8 characters long, eg, admin123.

Again uncomment $wgAuth lines in LocalSettings.php. Note that for local login select "Your domain" as local

Debugging login issues

For debugging add:
```
$wgShowExceptionDetails = True;
```
at end of LocalSetting.php file to get more details