I want a source code or a code for IOS application of how to connect to openVPN server using the certificate and using username and password for XCode

I am looking for a code for an iOS application specifically geared towards connecting to an openVPN server using a certificate and username & password with XCode. The type of application I want is Native, so past work should be included with the freelancer's proposal. The language I need the code written in is Swift or xcode. If you think you have the expertise for this project, I would love to hear from you!