Password protect a directory with Apache

 1  cd /var/www/html

2  sudo htpasswd -c /etc/httpd/.htpasswd admin

3  nano /etc/httpd/conf/httpd.conf

### below the /var/www/cgi-bin add rule for  /var/www/AdminLTE-3.1.0  ####

<Directory "/var/www/cgi-bin">

    AllowOverride None

    Options None

    Require all granted

</Directory>

<Directory "/var/www/AdminLTE-3.1.0">

    AllowOverride All

    Options None

    Require all granted

</Directory>

4  systemctl  restart httpd 

5  cd AdminLTE-3.1.0

6  nano .htaccess

## copy this ###

AuthType Basic

AuthName "Password Required"

Require valid-user

AuthUserFile /etc/httpd/.htpasswd

7  systemctl  restart httpd

https://www.ionos.com/digitalguide/server/configuration/password-protect-a-directory-with-apache/