有考虑支持 mschapv2吗

[G-Akiraka]

我使用wifi认证，报错信息如下，chap和pap可以正常验证，但是mschap不可以

ERRO[2023-06-29 18:23:09.425] recovery invoke runtime error: invalid memory address or nil pointer dereference 
[xorm] [info]  2023/06/29 18:23:09.425625 [SQL] ROLL BACK
ERRO[2023-06-29 18:23:09.46] occur unknown error: runtime error: invalid memory address or nil pointer dereference 
DEBU[2023-06-29 18:23:09.46] 异常堆栈信息：goroutine 123 [running]:
runtime/debug.Stack()
        /usr/local/go/src/runtime/debug/stack.go:24 +0x65
go-rad/radius.RecoveryFunc.func1.1()
        /Users/akiraka/Downloads/yh-radius-master/radius/common_middleware.go:54 +0x1ad
panic({0x14e5e60, 0x18c19d0})
        /usr/local/go/src/runtime/panic.go:884 +0x213
go-rad/radius.pap({0xc00041c448?, 0x1?}, {0xc00041cc50, 0x6}, {0x1, 0x18, 0xc8, {0xa2, 0xce, 0x98, ...}, ...})
        /Users/akiraka/Downloads/yh-radius-master/radius/verify_password.go:34 +0x32b
go-rad/radius.UserVerify(0xc0000d0500)
        /Users/akiraka/Downloads/yh-radius-master/radius/auth_middleware.go:47 +0x1cb
go-rad/radius.(*Context).Next(...)
        /Users/akiraka/Downloads/yh-radius-master/radius/context.go:30
go-rad/radius.NasValidation(0xc0000d0500)
        /Users/akiraka/Downloads/yh-radius-master/radius/common_middleware.go:25 +0x2a5
go-rad/radius.(*Context).Next(...)
        /Users/akiraka/Downloads/yh-radius-master/radius/context.go:30
go-rad/radius.RecoveryFunc.func1(0xc0000c4dc0?)
        /Users/akiraka/Downloads/yh-radius-master/radius/common_middleware.go:60 +0x8f
go-rad/radius.(*Context).Next(...)
        /Users/akiraka/Downloads/yh-radius-master/radius/context.go:30
go-rad/radius.(*radEngine).HandlePackage.func1({0xc0001d0000?, 0xc0004c4f90?, 0xc0004c4fd0?}, 0xc000012010, 0xc000147260)
        /Users/akiraka/Downloads/yh-radius-master/radius/radius_engine.go:86 +0x282
created by go-rad/radius.(*radEngine).HandlePackage
        /Users/akiraka/Downloads/yh-radius-master/radius/radius_engine.go:69 +0x44a 
INFO[2023-06-29 18:23:09.46] 响应报文：RadiusPackage:{
        Code=2
                Identifier=24
                Length=41
                Authenticator=939c8bd39e575b5415663235eff3ce02
                isChap=false
                RadiusAttrs: [
                         Reply-Message=occur unknown error]
        }