Hello, my name is Ta-kun.
I would like to ask you about creating a Playground. I created a Playground from Trailhead and logged in for the first time. When I logged in for the first time, an unfamiliar email address was set in the "Personal Information" email address in the image I pasted.
I deleted and saved the "Email" email address, but it never changed.
What steps should I take in such a case?
If possible, the email address set in the trailhead profile should have been set when the playground was created.