text: const Database = require('sqlite-async');
  
  function execute(db) {
  	return db.exec(`
      CREATE TABLE IF NOT EXISTS proffys (
          id INTEGER PRIMARY KEY AUTOINCREMENT,
          name TEXT,
          avatar TEXT,
          whatsapp TEXT,
          bio TEXT
          );
          
          CREATE TABLE IF NOT EXISTS classes (
              id INTEGER PRIMARY KEY AUTOINCREMENT,
              subject INTEGER,
              cost TEXT,
              proffy_id INTEGER
              );
  
          CREATE TABLE IF NOT EXISTS class_schedule (
              id INTEGER PRIMARY KEY AUTOINCREMENT,
              class_id INTEGER,
              weekday INTEGER,
              time_from INTEGER,
              time_to INTEGER
          );
  
          `);
  }
  
  module.exports = Database.open(__dirname + '/database.sqlite').then(execute);