How to Create a Temporary WordPress Login?

Ever need to create a WordPress user account that is used only temporarily? Manually creating temporary accounts or using wp-cli is good, but the problem with this is that in some situations you may forget to delete the user afterwards. This article will show you how to create a temporary login to WordPress without passwords.
When do you need a temporary login in WordPress?
Many users or managers of sites and blogs on WordPress need to access the admin area to edit, post or check something. Developers and content managers may need access to make adjustments on the site and to update content. Anyway, if you trust the developer, you can keep following the old fashioned way, creating an administrator account for them and then delete it when the job is done. You can add new users and authors in the WP and then block the user without deleting the account.
The problem is when you forget you added someone with privileges to make changes to your site. This type of access makes your website open to potential security threats and unprotects the data.
With the temporary login to WordPress, you create temporary accounts that do not require a password and are automatically disabled after a certain
Source: https://managewp.org/articles/13607/how-to-create-a-temporary-wordpress-login

source https://williechiu40.wordpress.com/2016/10/13/how-to-create-a-temporary-wordpress-login/