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 # Interface ModelCenter::ILoginCallback

 Last update: 16.07.2025 

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**Definition**: `ModelCenter/src/ModelCenter.odl` (line 4918)

The Login Callback allows non-ModelCenter processes to hook into [ModelCenter](namespaceModelCenter.md#namespaceModelCenter)'s authentication. Primarily used when running [ModelCenter](namespaceModelCenter.md#namespaceModelCenter) in server mode.

## Members

- [loginSucceeded](interfaceModelCenter_1_1ILoginCallback.md#interfaceModelCenter_1_1ILoginCallback_1a4b7dc5df7be75023f025f8d83fff7579)
- [requestAuthCredentials](interfaceModelCenter_1_1ILoginCallback.md#interfaceModelCenter_1_1ILoginCallback_1a9a1b24d936f4ee5dd2979ad38538929b)
- [verifySslWarning](interfaceModelCenter_1_1ILoginCallback.md#interfaceModelCenter_1_1ILoginCallback_1a9c27b392b3c109f6abe689251e1e27c7)

## Public functions

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### Function requestAuthCredentials

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```
boolean ModelCenter::ILoginCallback::requestAuthCredentials(BSTR uri, boolean isFailedAttempt, VARIANT *username, VARIANT *password, VARIANT *savePassword)

```

Called when [ModelCenter](namespaceModelCenter.md#namespaceModelCenter) needs to request a username and password. **Parameters**:

- **uri**: URI authenticating to
- **isFailedAttempt**: true if request is due to previous failed attempt, false otherwise
- **username**: Username to use. Cannot be null.
- **password**: Password to use. Cannot be null.
- **savePassword**: True if password should be saved, false otherwise. Cannot be null.

**Returns**:

true if username/password is submitted, false otherwise

**Exceptions**:

- **COM**: exception if username, password, or savePassword is null

**Parameters**:

- BSTR **uri**
- boolean **isFailedAttempt**
- VARIANT \* **username**
- VARIANT \* **password**
- VARIANT \* **savePassword**

**Return type**: boolean

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### Function loginSucceeded

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```
void ModelCenter::ILoginCallback::loginSucceeded(BSTR uri, BSTR username, BSTR password, boolean savePassword)

```

Called when [ModelCenter](namespaceModelCenter.md#namespaceModelCenter) succeeds in authentication. **Parameters**:

- **uri**: URI successfully authenticated to
- **username**: username that successfully authenticated
- **password**: password that successfully authenticated
- **savePassword**: true if password should be saved, false otherwise

**Parameters**:

- BSTR **uri**
- BSTR **username**
- BSTR **password**
- boolean **savePassword**

**Return type**: void

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### Function verifySslWarning

![](https://img.shields.io/badge/-public-brightgreen "public")

```
boolean ModelCenter::ILoginCallback::verifySslWarning(BSTR msg)

```

Called when [ModelCenter](namespaceModelCenter.md#namespaceModelCenter) needs an SSL warning to be verified/accepted. **Parameters**:

- **msg**: message to display to user

**Returns**:

true if [ModelCenter](namespaceModelCenter.md#namespaceModelCenter) should proceed, false otherwse

**Parameters**:

- BSTR **msg**

**Return type**: boolean