{
  "name": "battle",
  "version": "1.0.0",
  "description": "",
  "main": "battle.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.15.4",
    "password-hash": "^1.2.2",
    "socket.io": "^2.0.3"
  }
}

{
  "name": "battle",
  "version": "1.0.0",
  "description": "",
  "main": "battle.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.15.4",
    "mysql": "^2.14.1",
    "password-hash": "^1.2.2",
    "socket.io": "^2.0.3"
  }
}

Add mysql module to dependencies
Add mysql module to dependencies
