Error: Route.post() requires callback functions but got a [object Undefined]
    at Route.(anonymous function) [as post] (/home/slim/template/interface/node_modules/express/lib/router/route.js:196:15)
    at EventEmitter.app.(anonymous function) [as post] (/home/slim/template/interface/node_modules/express/lib/application.js:481:19)
    at Object.<anonymous> (/home/slim/template/interface/app.js:113:5)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:935:3