title: Error: Cannot find module 'cors'
body: <p>I keep getting this error message below:
  I tried to find other stackoverflow post and articles but couldn't really sovle it.
  do any of you guys know what the problem is it?</p>
  
  <pre><code>`kimeric@pal-nat186-87-17  ~/Desktop/cs390/Assignment9/backEnd  master ✚ ● ?  node server9.js
  module.js:472
      throw err;
      ^
  
  Error: Cannot find module 'cors'
      at Function.Module._resolveFilename (module.js:470:15)
      at Function.Module._load (module.js:418:25)
      at Module.require (module.js:498:17)
      at require (internal/module.js:20:19)
      at Object.&lt;anonymous&gt; (/Users/kimeric/Desktop/cs390/Assignment9/backEnd/server9.js:11:12)
      at Module._compile (module.js:571:32)
      at Object.Module._extensions..js (module.js:580:10)
      at Module.load (module.js:488:32)
      at tryModuleLoad (module.js:447:12)
      at Function.Module._load (module.js:439:3)`
  </code></pre>