To install the Advanced Username manager. Follow the steps given below
Step 1) Log in to the WordPress Dashboard.
Step 2) On the Dashboard of your website, scroll down the left-hand sidebar and click on Plugins.
Step 3) From the Installed Plugins page, click on Add New at the top of the page. Alternatively, click on Add New from the drop-down menu under Plugins on the sidebar.
Step 4) On the Add Plugins page, you can see the upload button on the left-hand side, at the top of the page.
Step 5) Download Advanced Username Manager Zip File.
Step 6) Activate the Advanced Username Manager plugin.
Step 7) The plugin is now installed and activated.