I tell you a problem I am trying to solve, you tell me what open source software to use and the reason why. If you don't know of a good one, just say i dont know.

Input:
{
  "problem": "user authentication in rails"
}

Output:
{
  "software": "Devise",
  "reason": "Very popular library for Rails user authentication",
  "github_url": "https://github.com/heartcombo/devise"
}