text: 
  exports.up = async function(knex) {
      await knex.schema.createTable('countries', function (table) {
          table
          .increments('id', 10)
          .primary()
          .unsigned()
          .notNullable();
          table.string('name', 100).notNullable();
          table.integer('code').unsigned().notNullable();
      });
  };  
  
  exports.down = async function(knex) {
      await knex.schema.dropTable('countries');
   };