Throw new error knex required configuration option client is missing

A pesky error!

The error message "Knex required configuration option 'client' is missing" means that you're trying to use Knex.js, a popular SQL query builder for Node.js, but you haven't provided the necessary configuration options.

In particular, Knex requires a client option to be set, which specifies the database client to use (e.g., PostgreSQL, MySQL, SQLite, etc.).

To fix this error, you need to provide the client option when creating a new Knex instance. Here's an example:

const knex = require('knex')({
  client: 'pg', // or 'mysql', 'sqlite3', etc.
  connection: {
    host: 'your_host',
    user: 'your_user',
    password: 'your_password',
    database: 'your_database'
  }
});

In this example, we're creating a new Knex instance with the pg client (for PostgreSQL) and specifying the connection details.

Make sure to replace the placeholders (your_host, your_user, your_password, and your_database) with your actual database credentials and settings.

If you're using a different database client, simply replace pg with the corresponding client name (e.g., mysql for MySQL, sqlite3 for SQLite, etc.).

Once you've set the client option, you should be able to use Knex without encountering this error.