如何在LUA中使用私钥对JWT签名

local jwt = require("jwt")

-- 创建JWT payload
local payload = {
  iss = "issuer",
  sub = "subject",
  iat = os.time(),
  exp = os.time() + 3600
}

-- 加载私钥
local private_key = [[
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
]]

-- 使用私钥对JWT进行签名
local token = jwt.encode(payload, private_key, 'RS256')

-- 输出签名后的JWT
print("Signed JWT:", token)