Many citations that adhere to how to cite a tiktok video mla or a rule set that resembles MLA will have the author's name or user guideline name in the in-text citation. Use the real name if you know it. If you do not know the author's name, then use the TikTok handle. https://www.studyunicorn.com/blogs/how-to-cite-a-tiktok-mla-apa-chicago-style-guide