Auth Wrapper (#1174)

* Auth Wrapper

* Tweak cmd flag

* auth_excludes => auth_exclude

* Make Auth.Excludes variadic

* Use metadata.Get (passes through http and http2 it will go through various case formats)

* fix auth wrapper auth.Auth interface initialisation

Co-authored-by: Asim Aslam <asim@aslam.me>

auth/options.go

@@ -7,10 +7,18 @@ import (
 type Options struct {
 	PublicKey  []byte
 	PrivateKey []byte
+	Excludes   []string
 }
 
 type Option func(o *Options)
 
+// Excludes endpoints from auth
+func Excludes(excludes ...string) Option {
+	return func(o *Options) {
+		o.Excludes = excludes
+	}
+}
+
 // PublicKey is the JWT public key
 func PublicKey(key string) Option {
 	return func(o *Options) {