These are the following shortcodes you can use for Ultimate LinkedIn Plugin:

[wpli_login_link]

Use this shortcode to display the Sign In link anywhere on your site.

Non-logged in users will see this customized LinkedIn Sign in button.

You can set a custom message via Settings for logged in users. Nothing is shown when this field is left empty.

[wpli_locked_content]

Use this shortcode to hide content for non-logged in users. The locked content will only show to users who have logged in via LinkedIn at least once.

When non-logged in users view the page, the content inside the shortcode will not be visible. See example below.

You can set a custom message via Settings under Locked Content tab which non-logged in users will see.