Add a Text Box to your page. For the Text Box, add a ‘Welcome Message’. In the dynamic field, Do a Search For “Unique ID = Input Enter your Unique ID’s Value”. Add the “First Name” or whatever you want to welcome them by.
*Set the text box to “This element is visible on page load” to false by unchecking the box.
Click on the Enter button, and start workflow.
Choose the option to “Show” the Text Welcome Search for Users option.
Obviously, you can make it look much better, just wanted to show you the process.
Should be good to go. Let me know if you need more help with this.