def client_json(options)
      {
        client: {
          username: options[:username],
          name: options[:name],
          email: options[:email],
          public_key: File.read(options[:public_key])
        }
      }.to_json
    end
def client_json(options)
      {
        client: {
          username: options[:username],
          name: options[:name],
          email: options[:email],
          public_key: File.read(options[:public_key])
        }
      }.to_json
    end
Formulates the client json for the post request

 @param options [Hash] fields from fenton command line
 @return [String] json created from the options hash