Warning when installing mysql for nodejs

Question

Can't install mysql with npm.

I run npm install mysql and getting this error

npm WARN mypage@1.0.0 No repository field.

This is package.json file

{
  "name": "mypage",
  "version": "1.0.0",
  "description": "testing something with node and express",
  "main": "index.js",
  "scripts": {
    "test": "mypage"
  },
  "author": "joe",
  "license": "ISC",
  "dependencies": {
    "express": "^4.15.2"
  }
}