Add Namespace to Auth (#1438)

Co-authored-by: Ben Toogood <ben@micro.mu>

auth/options.go

@@ -73,6 +73,8 @@ type GenerateOptions struct {
 	Roles []string
 	// SecretExpiry is the time the secret should live for
 	SecretExpiry time.Duration
+	// Namespace the account belongs too
+	Namespace string
 }
 
 type GenerateOption func(o *GenerateOptions)
@@ -91,6 +93,13 @@ func WithRoles(rs ...string) GenerateOption {
 	}
 }
 
+// WithNamespace for the generated account
+func WithNamespace(n string) GenerateOption {
+	return func(o *GenerateOptions) {
+		o.Namespace = n
+	}
+}
+
 // WithSecretExpiry for the generated account's secret expires
 func WithSecretExpiry(ex time.Duration) GenerateOption {
 	return func(o *GenerateOptions) {