There is a conflict with the library "go-http-metrics/middleware" used for gin server request metrics. please add the possibility to change the name or add a custom prefix.

below the error:

panic: a previously registered descriptor with the same fully-qualified name as Desc{fqName: "http_request_duration_seconds", help: "The latency of the HTTP requests.", constLabels:
{}, variableLabels: [service handler method code]} has different label names or a different help string

goroutine 1 [running]:
github.com/prometheus/client_golang/prometheus.(*Registry).MustRegister(0xc00048d500, {0xc0000121e0, 0x3, 0x0})
go/pkg/mod/github.com/prometheus/[email protected]/prometheus/registry.go:403 +0x7f
github.com/slok/go-http-metrics/metrics/prometheus.NewRecorder({{0x0, 0x0}, {0x1da5680, 0xb, 0xb}, {0xc00000e080, 0x8, 0x8}, {0x17f44f0, 0xc00009c050}, ...})
/go/pkg/mod/github.com/slok/[email protected]/metrics/prometheus/prometheus.go:101 +0x5a9

Sometimes one doesn't care about the individual status codes. A statusCode processor would allow to map 200 responses to status=successful and all others to status=failed allowing for easier querying.

If there's no response the populated status code is 0. Changing this to something bogus like 999 would allow users to query for everything >= 500 to catch all kinds of errors.

https://github.com/linki/instrumented_http/blob/master/client.go#L72