data return nil

[dattp]

Hello I am implementing lua-resty-jwt in my plugin by lua, but when i use jwt.load_jwt function i received nil result. This's my code

local jwt = require "resty.jwt"

local accessToken = kong.request.get_header('authorization')
print('======>accessToken: ', accessToken)

local jwtLoaded = jwt.load_jwt(accessToken)
print('======>jwtObject: ', tostring(jwtLoaded[1])) -- log nil

[dattp]

sr, This is my mistake. Should use cjson to print