The operation was rejected by your operating system. npm ERR! It is likely you do not have the permissions to access this file as the current user npm ERR! npm ERR! If you believe this might be a permissions issue, please double-check the code example

Example 1: The operation was rejected by your operating system. npm ERR! It is likely you do not have the permissions to access this file as the current user

sudo chown -R $USER /usr/local/lib/node_modules

cd /Users/Marc/Desktop/Dev
rm -rf ./masterclass/node_mdoules/
chown -R $USER ./masterclass/
cd masterclass    
npm install