# Identify Users
### Identify a User
To identify **users you will need to additionally call Zipy.identify(uuid, {userInfo}).** This will help you identify the users of your application by associating your own unique identifier with their activity. This method should typically be called when your users identify themselves by signing in to your application.
\
To identify users you need to-
1. [Install zipy ](/zipy-for-mobile/flutter-setup/install-flutter.md)for flutter in your application.
2. Import zipy where you want to identify the user
```dart
import 'package:zipy_flutter/zipy_flutter.dart';
```
3. Call the identify function like this
```dart
Zipy.identify("cbrandon@brands.com", { //uuid should be unique for all the users
email : "cbrandon@brands.com",
firstName : "Charles",
lastName : "Brandon",
});
```
### Anonymize a User
To anonymize or disassociate a previously identified user of your application from the session, use the following code in a source file where the user signs out of your application:
**Note:** We recommend calling `Zipy.anonymize()` when the user logs out. This ends the current identified session and starts a fresh, anonymous session, ensuring that subsequent activity isn’t mistakenly linked to the previous user.
```dart
import 'package:zipy_flutter/zipy_flutter.dart';
Zipy.anonymize();
```
**The** `uuid` **sent to Zipy can be viewed in the Session Replays list in the user column, as shown in the image below:**
Zipy.identify(uid, {userInfo})
Following are the method parameters:
| Name | Description |
| -------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| uuid | A string denoting your unique identifier for your user. Examples of unique identifiers could be UUID, email ID, full name or any other string that uniquely identifies your users. |
| userInfo | A JSON object which specifies additional details about your user. (Optional) |
**Previously identified users of your application can be anonymized by calling the zipy.anonymize()** m**ethod. This will automatically split the session and associate the new session with a new anonymous user which Zipy will identify with its own identification. This method should typically be called when users sign out of your application.**
### **Custom identifiers**
We allow a maximum of 10 custom identifiers per project which can be created as per your use-case. To use custom identifiers, you can add them to the existing userInfo object in Zipy’s identify method:
```dart
Zipy.identify("cbrandon@brands.com", {
'email': "cbrandon@brands.com",
'firstName': "Charles",
'lastName' : "Brandon",
'customerName': "LLC",
'product': "Bottles",
});
```
**In case you want to add your own custom identifiers in addition to the identifiers we have defined for you, please reach out to .**
[ ](https://docs.zipy.ai/configure/identifying-users)
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