# Change a user's email

**PATCH /groups/{groupId}/apps/{appId}/users/{userId}/reset_email**

Change the email address for an [email/password user](https://www.mongodb.com/zh-cn/docs/atlas/app-services/authentication/email-password/) by ID.


## Servers
- The root API resource and starting point for the App Services API.: https://services.cloud.mongodb.com/api/admin/v3.0 (The root API resource and starting point for the App Services API.)


## Authentication methods
- Token auth


## Parameters

### Path parameters
- **groupId** (string)
  An Atlas [Project/Group
  ID](https://docs.atlas.mongodb.com/tutorial/manage-projects/).
- **appId** (string)
  The ObjectID of your application.
  [The App Services API Project and Application IDs section](#section/Project-and-Application-IDs) demonstrates how to find this
  value.
- **userId** (string)
  User Account ID


### Body: application/json (object)
The new email address for the user.
- **email** (string)
  The new email for the user.


## Responses
### 204
No Content

### 400
- Payload is formatted incorrectly.
- The email in the payload is not a string.
- The email in payload has 0 or greater than 128 characters.
- The user does not have a local-userpass identity.

### 404
The appId, groupId, or userId is invalid.


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