Add Username/Password to URL

Needed to allow auth for TURN

errors.go

@@ -41,4 +41,10 @@ var (
 
 	// ErrRemotePwdEmpty indicates agent was started with an empty remote pwd
 	ErrRemotePwdEmpty = errors.New("remote pwd is empty")
+
+	// ErrUsernameEmpty indicates agent was give TURN URL with an empty Username
+	ErrUsernameEmpty = errors.New("username is empty")
+
+	// ErrPasswordEmpty indicates agent was give TURN URL with an empty Password
+	ErrPasswordEmpty = errors.New("password is empty")
 )

url.go

@@ -102,6 +102,8 @@ type URL struct {
 	Scheme   SchemeType
 	Host     string
 	Port     int
+	Username string
+	Password string
 	Proto    ProtoType
 }