fix on check if created user already exists

controllers/authController.go

@@ -104,6 +104,13 @@ func AddUser(c *fiber.Ctx) error {
 
 	var user models.User
 
+	database.DB.Where("email = ?", data["email"]).First(&user)
+
+	if user.Id != 0 {
+		return c.JSON(fiber.Map{
+			"message": "Usuário já cadastrado"})
+	}
+
 	database.DB.Where("channel = ?", strings.ToLower(data["channel"])).First(&user)
 
 	if user.Id != 0 {