Thank you for trying Test Studio.
There are several possible solutions how to create a different user every time.
1. Data Driven Testing, it is a testing methodology in which the same sequence of test steps are performed repeatedly using a data source to drive the input values of those steps and/or the values to expect when performing verification steps.
You can put as much as you want names in an Excel file or in the local data of the Test Studio. Now it will use a different name on every iteration of the test.
I recorded a short video as a demonstration.
2. You can implement a code into a coded step which will generate a random string. Then you can use that string for the name of the user. Here is a sample code:
Random randomGenerator = new Random();
string userName = string.Empty;
maxLetterNumber = letters.Length - 1;
i = 0; i <= 7; i++)
userName += letters[randomGenerator.Next(0, maxLetterNumber)];
Pages.YourApplication.TextBox.Text = userName;
I recorded another video
as a demonstration.
Hope this helps.
the Telerik team