text: 
  exports.up = function(knex) {
      return knex.schema.createTable('users', function(table){
          table.string('id').primary();
          table.string('name').notNullable();
          table.string('email').notNullable();
      });
  };
  
  exports.down = function(knex) {
      return knex.schema.dropTable('users');
  };
  