• Login to cPanel.
• Locate and click on the "Password Protect Directories" icon under the "Security" category.

• A prompt will appear asking you where the directory is located at. The default option will work for most users.

• Select the specific folder you want to password protect.

• Enter the required information:     
  • Password protect this directory - Choose whether or not the directory is password protected.
  • Name the protected directory - Essentially an alias for the protected directory.
• Click the "Save" button to update the directory settings.
• Enter authorization information to give a user access to the directory:  
  • Username - Create a username for the directory.
  • Password - Select a password for the user to access the directory.
  • Password (Again) - Confirm the user's password.

• Click the "Add/modify authorized user" button to save the user.