If multiple people at your company are using Infogram with different accounts, you only have to install the plugin once. When clicking on Add from Infogram, the user library associated with the API credentials will show.
If your chart is not in that library,
1. Simply go to your Infogram account
2. Open the project you want to embed and click Share
3. Open the Embed section and choose the WordPress embed link
4. Copy/paste the shortcode we provide, right into the WordPress visual editor
Alternatively, you can:
1. Copy the public URL from the Share dialogue,
2. Return to WordPress and paste the link at the bottom of the window that shows the library
3. The URL will be transformed into a shortcode for that chart, which in turn will visualize the embed in your website.