安全问题--jwt 规则建议修改下

[Lance621]

https://github.com/awake1t/linglong/blob/bedbe49597412abab1c1635e133957d782e65325/pkg/utils/jwt.go#L12-L31

按照这边的生成规则，会将用户账号密码保存到jwt token中，可以经过简单的解码进行账号密码的查看。

$ go test
GenerateToken
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6ImFkbWluIiwicGFzc3dvcmQiOiJwYXNzd29yZCIsImV4cCI6MTY2Njc2NjA3NSwiaXNzIjoibGluZ2xvbmcifQ.4Ia5g5e0EzkOUjJ-Xmnu59lX6JiJVnDVaw_p-7vBrtA
PASS
ok      linglong/pkg/utils      0.063s

$ .\jwt-hack.exe decode eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VybmFtZSI6ImFkbWluIiwicGFzc3dvcmQiOiJwYXNzd29yZCIsImV4cCI6MTY2Njc2NjA3NSwiaXNzIjoibGluZ2xvbmcifQ.4Ia5g5e0EzkOUjJ-Xmnu59lX6JiJVnDVaw_p-7vBrtA
   d8p 8d8   d88 888888888          888  888 ,8b.     doooooo 888  ,dP
   88p 888,o.d88    '88d     ______ 88888888 88'8o    d88     888o8P'
   88P 888P`Y8b8   '888      XXXXXX 88P  888 88PPY8.  d88     888 Y8L
88888' 88P   YP8 '88p               88P  888 8b   `Y' d888888 888  `8p
-------------------------
time="2022-10-26T11:36:19+08:00" level=info msg="Decoded data(claims)" header="{\"alg\":\"HS256\",\"typ\":\"JWT\"}" method="&{HS256 SHA-256}"
time="2022-10-26T11:36:19+08:00" level=info msg="Expiraton Time" EXP=1666766075 TIME="1970-01-01 08:00:01.666766075 +0800 CST"
{"exp":1666766075,"iss":"linglong","password":"password","username":"admin"}