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README.md

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 # Certify
-[![Go Report Card](https://goreportcard.com/badge/github.com/nothinux/certify)](https://goreportcard.com/report/github.com/nothinux/certify)  ![test status](https://github.com/nothinux/go-ps/actions/workflows/test.yml/badge.svg?branch=master)  
+[![Go Reference](https://pkg.go.dev/badge/github.com/nothinux/certify.svg)](https://pkg.go.dev/github.com/nothinux/certify)  [![Go Report Card](https://goreportcard.com/badge/github.com/nothinux/certify)](https://goreportcard.com/report/github.com/nothinux/certify)  ![test status](https://github.com/nothinux/go-ps/actions/workflows/test.yml/badge.svg?branch=master)  [![codecov](https://codecov.io/gh/nothinux/certify/branch/master/graph/badge.svg?token=iR3c5Zwo3F)](https://codecov.io/gh/nothinux/certify)  
 Certify can be used for creating a private CA (Certificate Authority) and issuing certificates signed by the pre-created CA.
 
 Certify is easy to use and can be used as an alternative to OpenSSL.