add user role

internal/validator/user_validator.go

@@ -37,14 +37,10 @@ func (v *UserValidatorImpl) ValidateCreateUserRequest(req *contract.CreateUserRe
 		return errors.New("password must be at least 6 characters"), constants.MalformedFieldErrorCode
 	}
 
-	if strings.TrimSpace(req.Role) == "" {
+	if req.RoleID == nil {
 		return errors.New("role is required"), constants.MissingFieldErrorCode
 	}
 
-	if !isValidUserRole(req.Role) {
-		return errors.New("invalid user role"), constants.MalformedFieldErrorCode
-	}
-
 	return nil, ""
 }