Add a column with a default value to an existing table in SQL Server

promise doesn't work, how to use catch in this way?

Adams

I'm trying to use promise to make error message to the console when Mongo connection doesn't work. i get an error: Cannot read properties of undefined (reading 'catch') how can i fix it? it supposed to work like that. i can use try & catch block but i prefer to know how to use it this way and what is wrong

mongoose
  .connect(DB, {
    useNewUrlParser: true,
    useCreatIndex: true,
    useFindAndModify: false,
  })
  .then(() => {
    console.log('DB conecttion successful')
    .catch(() => console.log('Error'));
  });

const port = 3000;
app.listen(port, () => {
  console.log(`app runing on port ${port}`);
});