MultiProvProfileFastlaneXcode8.rb

# 1) 
# ...Parse a configuration file...
schemes = parse(file: "config.json")

# 2)
for scheme in schemes do
  # 3)
  # Provide environment variables for sigh using the current `scheme` object
  # ...
  # ENV["SIGH_USERNAME"] = scheme["apple_id"]
  # ...
  
  # 4)
  profile_uuid = sigh
  
  # 5)
  gym(
    xcargs: "PROVISIONING_PROFILE_SPECIFIER='#{profile_uuid}'"  
  )
end