As shown in video above, paste this code into your .htaccess file:
<Files wp-login.php> order deny,allow Deny from all Allow from xx.xxx.xxx.xxx </Files>
Replace the xx.xxx.xxx.xxx with the ip addresses of anyone you want to have access to the wp-login.php file
For multiple ip addresses, use Allow from xx.xxx.xxx.xxx for each ip address on its own line as shown in the video
If you are not sure what your Ip Address is then you can go to a site called www.whatismyip.com and your ip address will be displayed.