feat(actions): local users (#5089)

Actions are extended to to local users. It's possible to run custom code during registration and authentication of local users.

internal/actions/object/object.go

@@ -0,0 +1,14 @@
+package object
+
+import "github.com/dop251/goja"
+
+func objectFromFirstArgument(call goja.FunctionCall, runtime *goja.Runtime) *goja.Object {
+	if len(call.Arguments) != 1 {
+		panic("exactly one argument expected")
+	}
+	object := call.Arguments[0].ToObject(runtime)
+	if object == nil {
+		panic("unable to unmarshal arg")
+	}
+	return object
+}