title: How to solve `TypeError: person.save is not a function` - what is wrong?
body: <p>I want to save some data in mongodb database. So install mongoose node package to help me. And fallow the tutorial to do my best. But I got bellow error:</p>
  
  <p>How to solve <code>TypeError: person.save is not a function</code> - what is wrong?</p>
  
  <p><strong>Person Model:</strong></p>
  
  <pre><code>const mongoose = require('mongoose');
  
  const personSchema = new mongoose.Schema({
      name: {
          type: String,
          required: true,
          trim: true,
          minLength: 3
      }
  });
  
  const Person = mongoose.model('person', personSchema);
  module.exports = Person;
  </code></pre>
  
  <p><strong>Sever.js</strong></p>
  
  <pre><code>const express = require('express');
  const mongoose = require('mongoose')
  let Person = require('./model/Person')
  
  mongoose.connect(process.env.DATABAS_URL,
  { useNewUrlParser: true, useUnifiedTopology: true }, 
  () =&gt; {
      console.log('DB Ok!')
  })
  
  const app = express();
  
  app.use(express.json());
  
  app.post('/add', async (req, res) =&gt; {
      const person = new Person({ name: req.body.name })
      console.log('/add route');
      console.log(req.body);
      try {
          console.log(`try`);
          const newPerson = await person.seve();
          res.json(newPerson);
          console.log(`end try:  ${newPerson}`)
      } catch (err) {
          res.status(500).json({"err" : err});
          console.log(`catch: ${err}`);
  
      }
  });
  
  
  const PORT = process.env.PORT || 3000;
  app.listen(PORT, () =&gt; console.log(`Server run on port ${PORT}`));
  </code></pre>
  
  <p>and here is my console:</p>
  
  <pre><code>Server run on port 3000
  DB Ok!
  /add route
  { name: 'Mohsen Rasouli'}
  try
  catch: TypeError: person.seve is not a function
  </code></pre>
  
  <p>and Postman App return:</p>
  
  <pre><code>{
      "err": {}
  }
  </code></pre>
  
  <p>so... 
  I don't now where is the problem and how can I solve it?
  I'm new with express and mongoose.</p>