Bower permission denied

I am using the following angular-seed app: https://github.com/angular/angular-seed

And when I execute $ bower install I receive the following error:

/usr/local/lib/node_modules/bower/lib/node_modules/configstore/index.js:54
                    throw err;
                    ^

Error: EACCES: permission denied, open '/Users/Mac/.config/configstore/bower-github.json'
You don't have access to this file.
at Error (native)
at Object.fs.openSync (fs.js:640:18)
at Object.fs.readFileSync (fs.js:508:33)
at Object.get (/usr/local/lib/node_modules/bower/lib/node_modules/configstore/index.js:35:26)
at Object.Configstore (/usr/local/lib/node_modules/bower/lib/node_modules/configstore/index.js:28:44)
at readCachedConfig (/usr/local/lib/node_modules/bower/lib/config.js:19:23)
at defaultConfig (/usr/local/lib/node_modules/bower/lib/config.js:11:12)
at Object.<anonymous> (/usr/local/lib/node_modules/bower/lib/index.js:16:32)
at Module._compile (module.js:556:32)
at Object.Module._extensions..js (module.js:565:10)

How do I fix the issue?

Alright, so I asked multiple people on different channels and got a solution to the problem. Figured I would post it here just in case someone had the same issues as me. I did the following commands

$ sudo chown -R $USER:$GROUP ~/.npm

then

$ sudo chown -R $USER:$GROUP ~/.config

then

$ bower init

completed the answers and then did

$ bower install