text: exports.up = function(knex) {
    return knex.schema.table('organizations', tbl => {
      tbl.text('bot_access_token').notNullable();
    });
  };
  
  exports.down = function(knex) {
    return knex.schema.table('organizations', tbl => {
      tbl.dropColumns('bot_access_token');
    });
  };
  