Generated API key not working to install InfusionSoft WordPress Plugin

Wanting install/activate several InfusionSoft plugins on my WordPress site. I got my App Name and API key, but WordPress says it can’t connect.

Depending on the plugin, you sometimes have to use a portion of your app name …
For example, if your app name is, some plugins require you to only use AB123, while others require and yet others require

Try those three methods and see if they connect.