Swagger go-server doesn't work

Hello Team,

I have generated the code from editor.swagger.io, apart from root other endpoint doesn't work. Someone please help me how to make it work?

Here is the code: https://github.com/mjangid/go-server 

build and run the application. 

GET 127.0.0.1:8080/ --> This will work

GET/POST 127.0.0.1:8080/beneficiary --> This doesn't work

Regards,

Manoj