Do you know that you can enable password less login to Salesforce? With a feature called “Lightning Login”, your users can login to Salesforce with just a mouse click and a tap on the mobile device.
It is available for every Salesforce Org, be it production, sandbox, developer edition, or Trailhead playground. So you can seamlessly log in to each of your environments even if you have different sandboxes, a handful of dev orgs, or dozens of Trailhead Playgrounds. Doesn’t matter!