Disable user registration with a flag

oauth2server/config/config.go

@@ -8,13 +8,14 @@ import (
 )
 
 var (
-	Port      string
-	Store     string
-	StoreAddr string
-	StoreUser string
-	StorePass string
-	SecretA   string
-	SecretB   string
+	Port             string
+	Store            string
+	StoreAddr        string
+	StoreUser        string
+	StorePass        string
+	SecretA          string
+	SecretB          string
+	UserRegistration bool
 )
 
 func init() {
@@ -39,6 +40,7 @@ func Refresh() {
 	as.Append(args.STRING, "storeAddr", "addr of DB", "/tmp/oauth2server.db")
 	as.Append(args.STRING, "storeUser", "user of DB", "")
 	as.Append(args.STRING, "storePass", "pass of DB", "")
+	as.Append(args.BOOL, "users", "allow user registration", false)
 	if err := as.Parse(); err != nil {
 		panic(err)
 	}
@@ -50,4 +52,5 @@ func Refresh() {
 	StorePass = as.Get("storepass").GetString()
 	SecretA = as.Get("secreta").GetString()
 	SecretB = as.Get("secretb").GetString()
+	UserRegistration = as.Get("users").GetBool() || Store == "map"
 }