I have several open source projects and was about to upload another one (to github) when I started wondering about the licensee in the license text. Some of my existing projects use either my real name, my github handle, or no licensee at all (which it probably shouldn't). I fully own all these repos.
After looking at other questions on this site, it seems using a pseudonym is fine although verifying the identifier of the author can be problematic. Regardless, I'm concerned what would happen if I change my pseudonym down the line as it is more likely that I would change my pseudonym/handle than my real name at some point. Would this suddenly invalidate the license?
In the case of github, I believe they track name changes so I could be verified this way. Also, I could simply add a new line
"Copyright (c) <year_of_name_change>, <new_pseudonym_here>" below the existing copyright notice to all my repos if I do change my pseudonym. Would this be sufficient in terms of a copyright notice/license? I guess people who have a copy of my code before the name change are only required to display the original pseudonym (if the license requires it).