text: module.exports = (user_info, callback) => {
  
      const MongoClient = require('mongodb').MongoClient;
  
      const uri = "***";
      const client = new MongoClient(uri, { useNewUrlParser: true });
  
      client.connect(err => {
          if (err) throw err;
  
          const collection = client.db('English').collection('users');
  
          if (user_info) {
              collection.insertOne(user_info, (err) => {
                  if (err) throw err;
  
                  console.log('Üye Kaydı Yapıldı');
              });
          }
  
  
  
  
          client.close(err => {
              if (err) throw err;
              callback();
          });
  
      });
  
  }
  
  