I’ve always felt uneasy about clients giving me their username and a temporary password to go in and install a new design to their blog. Not only is it THEIR space, but they’re giving you private information. Every time a designer is required to log-in to someone’s blog, the client has to change their passwords, and that can just get annoying after a while.
Did you know you don’t have to give out your personal information for a blog design install?
All you have to do is make the designer a temporary admin on your site, and then after they’re finished, the designer can be easily deleted off your admin list. No more changing your password a million times!
FOR BLOGGER:
Sign in to your blogger account. Click on the blog you’d like to add the administrative position to, and on the left hand side you’ll see your blog menu with SETTINGS at the bottom. Click on SETTINGS>Basic. You’ll see a spot under PERMISSIONS where you can enter an email address to add an author. Enter your designer’s google email address, and then wait for the designer to confirm the authorship confirmation. 
Once they have done that (this is important), you’ll have to go back to settings>basic and choose ‘admin’ from the drop down menu next to their name instead of ‘author.’ If only author is selected, the designer only has permission to write posts, not do anything behind the scenes!
FOR WORDPRESS:
Sign into your WordPress.org account. On the left hand side in your toolbar menu, right below Plugins you’re going to find and click on USERS. Then at the top of the page you’ll see (highlighted) ADD NEW. Click on that. 
WordPress then gives you the option to create a new user, putting in a username (get creative), password, email address, and the option to send them all the information. At the bottom of the form you’ll find a drop down menu. Be sure to mark the new user’s role as administration, because just like Blogger, the designer won’t be able to do anything design-wise without being assigned to that role.
Once your design has been installed, feel free to delete the new users/admins you have created!
Questions?
This is such a helpful post. Thank you so much! Bookmarked it :)
So helpful!! Thank you for this. :)