This is the question I asked: How to generate Perlin Noise for materials
Now I can't reply because my PC doesn't know that it was really me who asked that question. What can I do?
You can request your account be merged by visiting https://blender.stackexchange.com/contact, while logged into your current account and selecting the "I want to merge user profile" option and then selecting "continue" on the pop up.
For the "other profile link" field, copy and paste in the URL to your other profile (the one that asked the question you linked).
This will open a support ticket, and if you can prove ownership of the account that asked the question via the ticket, your current account and that account will be merged, tying that account's content to your current account.
This will give you access to reply to content as the question's OP