text: 
  exports.up = function(knex) {
    return knex.schema.createTable('players', p => {
        p.increments()
        p.string('first_name')
          .notNullable()
        p.string('last_name')
          .notNullable()
        p.string('team')
          .notNullable()
        p.string('number')
          .notNullable()
          .unique()
    })
  };
  
  exports.down = function(knex) {
    return knex.schema.dropTableIfExists('players')
  };
  