{
  "max_fleet_size":1,
  "fleet_name":"myFleet",
  "path_to_key":"/home/ubuntu/.ssh/MyKey.pem",
  "key_name":"MyKey",
  "security_group":"default",
  "aws_key":"AWS_KEY",
  "aws_secret_key":"AWS_SECRET_KEY"
}

{
  "max_fleet_size":1,
  "fleet_name":"myFleet",
  "path_to_key":"/home/ubuntu/.ssh/MyKey.pem",
  "name_of_key":"MyKey",
  "security_group":"default",
  "aws_key":"AWS_KEY",
  "aws_secret_key":"AWS_SECRET_KEY"
}

Fix name of key for AWS Key Name
Fix name of key for AWS Key Name
