add MICRO_AUTH_TOKEN, parse token in wrapper, preload config and othe… (#1261)

* add MICRO_AUTH_TOKEN, parse token in wrapper, preload config and other things

* fix wrapper panic

auth/options.go

@@ -1,41 +1,51 @@
 package auth
 
-import (
-	b64 "encoding/base64"
-)
-
 type Options struct {
-	PublicKey  []byte
-	PrivateKey []byte
-	Excludes   []string
+	// Token is an auth token
+	Token string
+	// Public key base64 encoded
+	PublicKey string
+	// Private key base64 encoded
+	PrivateKey string
+	// Endpoints to exclude
+	Exclude []string
 }
 
 type Option func(o *Options)
 
-// Excludes endpoints from auth
-func Excludes(excludes ...string) Option {
+// Exclude ecludes a set of endpoints from authorization
+func Exclude(e ...string) Option {
 	return func(o *Options) {
-		o.Excludes = excludes
+		o.Exclude = e
 	}
 }
 
 // PublicKey is the JWT public key
 func PublicKey(key string) Option {
 	return func(o *Options) {
-		o.PublicKey, _ = b64.StdEncoding.DecodeString(key)
+		o.PublicKey = key
 	}
 }
 
 // PrivateKey is the JWT private key
 func PrivateKey(key string) Option {
 	return func(o *Options) {
-		o.PrivateKey, _ = b64.StdEncoding.DecodeString(key)
+		o.PrivateKey = key
+	}
+}
+
+// Token sets an auth token
+func Token(t string) Option {
+	return func(o *Options) {
+		o.Token = t
 	}
 }
 
 type GenerateOptions struct {
+	// Metadata associated with the account
 	Metadata map[string]string
-	Roles    []*Role
+	// Roles/scopes associated with the account
+	Roles []*Role
 }
 
 type GenerateOption func(o *GenerateOptions)