为什么我的代码输出的是enumaration值而不是字符串？

我正在ruby中为CTF编写基于字典的攻击程序，但是我的输出打印了枚举值而不是字符串。我已经尝试过明确地将输出的变量转换为字符串，但这并没有改变任何东西。

require 'net/http'

def checkUsage()
if ARGV.length != 1

return false

end
return true
end

def generateUsername()

wordArray = Array.new
wordlist = File.open("words.txt", "r")

for word in wordlist

wordArray.push(word)

end

return wordArray.repeated_permutation(7).to_s

end

def generatePassword()

wordArray = Array.new
wordlist = File.open("words.txt", "r")

for word in wordlist

wordArray.push(word)

end

return wordArray.repeated_permutation(7).to_s

end

def requestAuthentication()

if(!checkUsage())

puts("Usage: frsDic <wordlist>")
return false

end

uri = URI("http://challenges.laptophackingcoffee.org:3199/secret.php")
req = Net::HTTP::Get.new(uri)

loop do

username = generateUsername()
password = generatePassword()

if req.basic_auth username, password
  puts"Username found: " + username
  puts"Password found: " + password
  break
else
  puts"Username failed: " + username
  puts"Password failed: " + password
end

end
end

requestAuthentication()

我原本希望打印出由bruteforce找到的用户名/密码字符串，但它只打印枚举值。