feat(auth): Add option to disable registration and tenant creation

app/controllers/register.go

@@ -1,6 +1,7 @@
 package controllers
 
 import (
+	"git.secnex.io/secnex/auth-api/config"
 	"git.secnex.io/secnex/auth-api/services"
 	"git.secnex.io/secnex/auth-api/utils"
 	"github.com/go-playground/validator/v10"
@@ -16,6 +17,11 @@ type RegisterRequest struct {
 }
 
 func RegisterController(c *fiber.Ctx) error {
+	if !config.CONFIG.AllowRegistration {
+		return utils.NewErrorResponse(fiber.StatusForbidden, &fiber.Map{
+			"message": "Registration is not allowed",
+		}).Send(c)
+	}
 	var request RegisterRequest
 	if err := c.BodyParser(&request); err != nil {
 		return utils.NewErrorResponse(fiber.StatusBadRequest, &fiber.Map{