code: function lookupProfileAt (name, date, agent = 'minecraft') {
    const hasDate = typeof date !== 'undefined'
    const query = hasDate
      ? `/users/profiles/${agent}/${name}?at=${date}`
      : `/users/profiles/${agent}/${name}`
  
    return fetch(`${CORE_API}${query}`, {
      headers: {
        'user-agent': USER_AGENT,
        'accept': 'application/json'
      }
    })
      .then(handleErrors)
      .then(res => {
        if (res.status === 204) throw new Error(`so such name at time: ${name}`)
        return res.json()
      })
  }
docs: Gets an abbreviated game profile at a given timestamp for an IGN name.
  
  **Prefer {@link lookupProfiles} when looking up current data.**
  
  @param {string} name - current profile name (IGN) of the user
  @param {number} [date] - UNIX timestamp to check the username at
  @param {string} [agent] - game agent to check against
  @returns {Promise<Object>} resolves with `{id, name, legacy?, demo?}`
  @see {@link http://wiki.vg/Mojang_API#Username_-.3E_UUID_at_time}
  @example
  const {id, name, legacy, demo} = await lookupProfileAt('Notch', 1503335853700)