yooo, iam happy to have a working a/c

Does anyone know what does it means location ~ ^/users in nginx ?

The tilde ("~") is shorthand for your home directory so you don't have to type the full path.

Context might make a different for the next part. Where in nginx are you seeing it used?

If it's being used in a regex statement, the "^" character means "the beginning of the string", so "^/users" might be a regex filter looking for string that begin with "/users".

Also, in some places, nginx uses ~ to indicate a case-sensitive filter.