text: /**
   * @param  {object} knex
   * @returns {Promise}
   */
  export function up(knex) {
    return knex.schema.createTable('sessions', (table) => {
      table.increments();
      table.timestamps();
      table.string('username').notNull();
      table.integer('user_id').notNull();
      table.string('refresh_token').notNull();
    });
  }
  
  /**
   * @param  {object} knex
   * @returns {Promise}
   */
  export function down(knex) {
    return knex.schema.dropTable('sessions');
  }
  