Fix merge error: use new method of getting scoped vars (apache#10751)

Author: DaanHoogland

server/src/main/java/com/cloud/user/AccountManagerImpl.java

@@ -1301,8 +1301,8 @@ public UserAccount createUserAccount(final String userName, final String passwor
         // Check permissions
         checkAccess(getCurrentCallingAccount(), domain);
 
-        if (!userAllowMultipleAccounts.valueInDomain(domainId) && !_userAccountDao.validateUsernameInDomain(userName, domainId)) {
-            throw new CloudRuntimeException("The user " + userName + " already exists in domain " + domainId);
+        if (!userAllowMultipleAccounts.valueInScope(ConfigKey.Scope.Domain, domainId) && !_userAccountDao.validateUsernameInDomain(userName, domainId)) {
+            throw new InvalidParameterValueException(String.format("The user %s already exists in domain %s", userName, domain));
         }
 
         if (networkDomain != null && networkDomain.length() > 0) {
@@ -1489,7 +1489,7 @@ public UserVO createUser(String userName, String password, String firstName, Str
             throw new PermissionDeniedException(String.format("Account: %s is a system account, can't add a user to it", account));
         }
 
-        if (!userAllowMultipleAccounts.valueInDomain(domainId) && !_userAccountDao.validateUsernameInDomain(userName, domainId)) {
+        if (!userAllowMultipleAccounts.valueInScope(ConfigKey.Scope.Domain, domainId) && !_userAccountDao.validateUsernameInDomain(userName, domainId)) {
             throw new CloudRuntimeException("The user " + userName + " already exists in domain " + domainId);
         }
 
@@ -1664,7 +1664,7 @@ protected void validateAndUpdateUsernameIfNeeded(UpdateUserCmd updateUserCmd, Us
             }
 
             // duplicate usernames cannot exist in same domain unless explicitly configured
-            if (!userAllowMultipleAccounts.valueInDomain(newAccount.getDomainId())) {
+            if (!userAllowMultipleAccounts.valueInScope(ConfigKey.Scope.Domain, newAccount.getDomainId())) {
                 assertUserNotAlreadyInDomain(existingUser, newAccount);
             }