Unable to access certificate in Azure function

I am executing my Azure function locally on HTTPS with the application arguments:
```
host start --useHttps --cert "server.pfx" --password ajay
```

where `server.pfx` is a self-signed certificate.

In the postman setting, I have set certificate for the URL corresponding to the function app.

In Azure function, I am reading certificate as follow:
```
var clientCert = req.HttpContext.Connection.ClientCertificate;
```

`clientCert` instance is always `null`. Am I missing some steps here ?

Reproduce the local HTTPS invocation using `host start --useHttps --cert "server.pfx" --password ajay` and the Postman certificate settings shown in the issue. Start at `req.HttpContext.Connection.ClientCertificate`; determine why it is null and document the required configuration or behavior once the certificate is accessible.

Written by the indexing model from the issue text.