Add Namespace to Auth (#1438)

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

auth/token/options.go

@@ -57,6 +57,8 @@ type GenerateOptions struct {
 	Metadata map[string]string
 	// Roles/scopes associated with the account
 	Roles []string
+	// Namespace the account belongs too
+	Namespace string
 }
 
 type GenerateOption func(o *GenerateOptions)
@@ -82,6 +84,13 @@ func WithRoles(rs ...string) func(o *GenerateOptions) {
 	}
 }
 
+// WithNamespace for the token
+func WithNamespace(n string) func(o *GenerateOptions) {
+	return func(o *GenerateOptions) {
+		o.Namespace = n
+	}
+}
+
 // NewGenerateOptions from a slice of options
 func NewGenerateOptions(opts ...GenerateOption) GenerateOptions {
 	var options GenerateOptions