text: exports.seed = function(knex) {
      // Deletes ALL existing entries
      return knex('potlucks_users').del()
        .then(function () {
          // Inserts seed entries
          return knex('potlucks_users').insert([
              { potluck_id: 1, user_id: 1 },
              { potluck_id: 2, user_id: 2 },
              { potluck_id: 3, user_id: 3 },
          ]);
        });
    };