WordPress administrator credentials are missing

i was putting the website on folder /demo then on publishing i removed from settings the /demo from WordPress Address (URL) field and Site Address (URL) field in settings

and then coplied all files from file manager from /demo to public_html and the website and the wordpress admin page worked normally

now if I delete the folder /demo or tried to change its name, and try to login to admin, it gives the below message:

WordPress administrator credentials are missing

i searched on the database, and found in the table _users in the user_url field, there is the URL /demo … when i remove it i got the below error when i try to login from wordpress toolkit

/home/website_name/.wp-toolkit/tmp.mFLgUXSnC8: line 4: cd: /home/website_name/public_html/demo: No such file or directory

now i have to keep /demo in the database _users table and the demo folder with all its files

what can be done to solve this, and what is the best practice for moving a website from /demo to public_html