Is there a way to change my site username?

go to pylo.co/contact and put a link to your user page and put th name you want it to be changed to

You can change name yourself in profile -> edit, but you can only change it from time to time

I didn't put in the right name and I would like to know how to change geo it to something else

Log in to your MCreator account on their website.
Click on your profile icon or your current username, usually located at the top right corner of the page.
Select "Settings" or "Profile" from the dropdown menu.
In the profile settings, look for the "Username" or "Display Name" field.
Enter your desired new name.
Save the changes by clicking "Save" or "Update".

You can change the name, but not too often