You can lock a directory with a password by using the cPanel Password Protected Directories
Log into your cPanel account.
In the Files
section, click on Directory Privacy
Click the icon to open a folder.
Click on the name of the directory you want to protect by password.
Under Security Settings
, check the box next to the Password protect this directory
and enter a name for the protected directory like Password Protected Area
. Then click the Save
Now click on the Go back
Scroll down the page and under Create User
fill in the username and password fields or use the Password Generator option to generate a new random password and copy the user/password to a notepad. You will need this when you want to open your password-protected directory and click on the Save
Now, should you try to open your password-protected directory in your browser through the URL www.example.com/myfolder, which is already password protected, your browser will prompt you to enter username and password.