Visual composer paid plugin installtion

i altered some code in composer.json
“type”: “vcs”,
“url” : “

In require filed i added

**composer update**
Running composer as root/super user is highly discouraged as packages, plugins and scripts cannot always be trusted
Loading composer repositories with package information
No valid composer.json was found in any branch or tag of,
could not load a package from it.

update [–prefer-source] [–prefer-dist] [–dry-run] [–dev] [–no-dev] [–lock] [–no-plugins] [–no-custom-installers] [–no-autoloader] [–no-scripts] [–no-progress] [–with-dependencies] [-v|vv|vvv|–verbose] [-o|–optimize-autoloader] [-a|–classmap-authoritative] [–ignore-platform-reqs] [–prefer-stable] [–prefer-lowest] [-i|–interactive] [–root-reqs] [–] []…

after getting this error i found these links