# DeviceRegistrations resource
> \[!IMPORTANT]
>
> The Push Notifications API is currently available as a
> Private Beta product. The information contained in this document is subject to change. You acknowledge
> and agree that your use of the Twilio Push Notifications API is subject to the terms of the [Services in
> Private Beta](https://www.twilio.com/en-us/legal/service-country-specific-terms/private-beta). This
> means that some features are not yet implemented and others may be changed before the product is
> declared as Generally Available. Private Beta products are not covered by the Twilio Support Terms or
> Twilio Service Level Agreement.
A Device Registration resource associates a device token with a [User](/docs/push-notifications/api/user-resource) for push notification delivery. Instead of managing device tokens yourself, you can store them as Device Registrations and send notifications to Users by their `userId`.
Each Device Registration links a `userId` to a device `token` and `provider` (`APN` or `FCM`), scoped to a specific [App](/docs/push-notifications/api/app-resource).
## DeviceRegistration Properties
## Register a Device
`POST https://comms.twilio.com/v1/PushNotifications/DeviceRegistrations`
Register a device for push notifications by making an HTTP `POST` request to the Device Registrations resource URI.
You must specify an `appName` that matches an existing [App](/docs/push-notifications/api/app-resource). If the `appName` does not match any existing App, the operation fails.
If you omit the `userId`, the API creates a new [User](/docs/push-notifications/api/user-resource) automatically.
### Request body parameters
```json
{"schema":{"title":"DeviceRegistrationRequest","type":"object","required":["appName","token","provider"],"properties":{"userId":{"x-twilio-version":1,"description":"The ID of the User to register the device to, if available.","title":"PushNotificationUserId","type":"string","pattern":"^comms_pushnotificationuser_[0-7][a-hjkmnpqrstv-z0-9]{25,34}","example":"comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8","refName":"PushNotificationUserId","modelName":""},"appName":{"description":"The name of the `App` to register the device for.\n\nIf the `appName` does not match the name \n of any existing Push Notification `App`, the operation will fail.","x-twilio-version":1,"title":"PushNotificationAppName","type":"string","pattern":"^[a-z0-9_]+$","minLength":1,"maxLength":64,"refName":"PushNotificationAppName","modelName":""},"token":{"type":"string","description":"The device token to register for push notifications."},"provider":{"x-twilio-version":1,"title":"PushNotificationProvider","description":"Push notification service provider.","type":"string","enum":["APN","FCM"],"refName":"PushNotificationProvider","modelName":"PushNotificationProvider"}}},"examples":{"ExistingUser":{"x-twilio-version":1,"summary":"Existing user","value":{"lang":"json","value":"{\n \"userId\": \"comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8\",\n \"token\": \"dqWD7WEC83K41WHyufTS7:APA91bFcrVaOLqKeJfSiEutJXX2Tr9wN_tYOwYd8rFA6mYUMBFqdz9n6k3v5EpFA_ukXD89hGqG3OarzbVfdjGnLOIAQfwbQcqJkjQWMrhwElrtU1y3JLDPfnjc0eTJLxzhyYvDFopEh\",\n \"appName\": \"limonade_app\",\n \"provider\": \"FCM\"\n}","meta":"","code":"{\n \"userId\": \"comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8\",\n \"token\": \"dqWD7WEC83K41WHyufTS7:APA91bFcrVaOLqKeJfSiEutJXX2Tr9wN_tYOwYd8rFA6mYUMBFqdz9n6k3v5EpFA_ukXD89hGqG3OarzbVfdjGnLOIAQfwbQcqJkjQWMrhwElrtU1y3JLDPfnjc0eTJLxzhyYvDFopEh\",\n \"appName\": \"limonade_app\",\n \"provider\": \"FCM\"\n}","tokens":[["{","#C9D1D9"],"\n ",["\"userId\"","#7EE787"],[":","#C9D1D9"]," ",["\"comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8\"","#A5D6FF"],[",","#C9D1D9"],"\n ",["\"token\"","#7EE787"],[":","#C9D1D9"]," ",["\"dqWD7WEC83K41WHyufTS7:APA91bFcrVaOLqKeJfSiEutJXX2Tr9wN_tYOwYd8rFA6mYUMBFqdz9n6k3v5EpFA_ukXD89hGqG3OarzbVfdjGnLOIAQfwbQcqJkjQWMrhwElrtU1y3JLDPfnjc0eTJLxzhyYvDFopEh\"","#A5D6FF"],[",","#C9D1D9"],"\n ",["\"appName\"","#7EE787"],[":","#C9D1D9"]," ",["\"limonade_app\"","#A5D6FF"],[",","#C9D1D9"],"\n ",["\"provider\"","#7EE787"],[":","#C9D1D9"]," ",["\"FCM\"","#A5D6FF"],"\n",["}","#C9D1D9"]],"annotations":[],"themeName":"github-dark","style":{"color":"#c9d1d9","background":"#0d1117"}}},"NewUser":{"x-twilio-version":1,"summary":"New User","value":{"lang":"json","value":"{\n \"token\": \"dqWD7WEC83K41WHyufTS7:APA91bFcrVaOLqKeJfSiEutJXX2Tr9wN_tYOwYd8rFA6mYUMBFqdz9n6k3v5EpFA_ukXD89hGqG3OarzbVfdjGnLOIAQfwbQcqJkjQWMrhwElrtU1y3JLDPfnjc0eTJLxzhyYvDFopEh\",\n \"appName\": \"limonade_app\",\n \"provider\": \"FCM\"\n}","meta":"","code":"{\n \"token\": \"dqWD7WEC83K41WHyufTS7:APA91bFcrVaOLqKeJfSiEutJXX2Tr9wN_tYOwYd8rFA6mYUMBFqdz9n6k3v5EpFA_ukXD89hGqG3OarzbVfdjGnLOIAQfwbQcqJkjQWMrhwElrtU1y3JLDPfnjc0eTJLxzhyYvDFopEh\",\n \"appName\": \"limonade_app\",\n \"provider\": \"FCM\"\n}","tokens":[["{","#C9D1D9"],"\n ",["\"token\"","#7EE787"],[":","#C9D1D9"]," ",["\"dqWD7WEC83K41WHyufTS7:APA91bFcrVaOLqKeJfSiEutJXX2Tr9wN_tYOwYd8rFA6mYUMBFqdz9n6k3v5EpFA_ukXD89hGqG3OarzbVfdjGnLOIAQfwbQcqJkjQWMrhwElrtU1y3JLDPfnjc0eTJLxzhyYvDFopEh\"","#A5D6FF"],[",","#C9D1D9"],"\n ",["\"appName\"","#7EE787"],[":","#C9D1D9"]," ",["\"limonade_app\"","#A5D6FF"],[",","#C9D1D9"],"\n ",["\"provider\"","#7EE787"],[":","#C9D1D9"]," ",["\"FCM\"","#A5D6FF"],"\n",["}","#C9D1D9"]],"annotations":[],"themeName":"github-dark","style":{"color":"#c9d1d9","background":"#0d1117"}}}},"encodingType":"application/json","conditionalParameterMap":{}}
```
### Responses
Create a DeviceRegistration
```ts
import { TwilioClient } from "twilio-comms";
async function main() {
const client = new TwilioClient({
accountId: "",
authToken: "",
});
await client.pushNotifications.deviceRegistrations.register({
userId: "comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8",
appName: "limonade_app",
token: "dqWD7WEC83K41WHyufTS7:APA91bFcrVaOLqKeJfSiEutJXX2Tr9wN_tYOwYd8rFA6mYUMBFqdz9n6k3v5EpFA_ukXD89hGqG3OarzbVfdjGnLOIAQfwbQcqJkjQWMrhwElrtU1y3JLDPfnjc0eTJLxzhyYvDFopEh",
provider: "FCM",
});
}
main();
```
```py
from twilio import TwilioComms
client = TwilioComms(
account_id="",
auth_token="",
)
client.push_notifications.device_registrations.register(
user_id="comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8",
app_name="limonade_app",
token="dqWD7WEC83K41WHyufTS7:APA91bFcrVaOLqKeJfSiEutJXX2Tr9wN_tYOwYd8rFA6mYUMBFqdz9n6k3v5EpFA_ukXD89hGqG3OarzbVfdjGnLOIAQfwbQcqJkjQWMrhwElrtU1y3JLDPfnjc0eTJLxzhyYvDFopEh",
provider="FCM",
)
```
```cs
using TwilioComms;
using System.Threading.Tasks;
using TwilioComms.PushNotifications;
public partial class Examples
{
public async Task Example() {
var client = new TwilioCommsClient(
accountId: "",
authToken: ""
);
await client.PushNotifications.DeviceRegistrations.RegisterAsync(
new DeviceRegistrationsRegisterRequest {
UserId = "comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8",
AppName = "limonade_app",
Token = "dqWD7WEC83K41WHyufTS7:APA91bFcrVaOLqKeJfSiEutJXX2Tr9wN_tYOwYd8rFA6mYUMBFqdz9n6k3v5EpFA_ukXD89hGqG3OarzbVfdjGnLOIAQfwbQcqJkjQWMrhwElrtU1y3JLDPfnjc0eTJLxzhyYvDFopEh",
Provider = PushNotificationProvider.Fcm
}
);
}
}
```
```java
package com.example.usage;
import com.twilio.comms.TwilioCommsClient;
import com.twilio.comms.resources.pushnotifications.deviceregistrations.requests.DeviceRegistrationsRegisterRequest;
import com.twilio.comms.types.PushNotificationProvider;
public class Example {
public static void main(String[] args) {
TwilioCommsClient client = TwilioCommsClient
.builder()
.credentials("", "")
.build();
client.pushNotifications().deviceRegistrations().register(
DeviceRegistrationsRegisterRequest
.builder()
.appName("limonade_app")
.token("dqWD7WEC83K41WHyufTS7:APA91bFcrVaOLqKeJfSiEutJXX2Tr9wN_tYOwYd8rFA6mYUMBFqdz9n6k3v5EpFA_ukXD89hGqG3OarzbVfdjGnLOIAQfwbQcqJkjQWMrhwElrtU1y3JLDPfnjc0eTJLxzhyYvDFopEh")
.provider(PushNotificationProvider.FCM)
.userId("comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8")
.build()
);
}
}
```
```go
package example
import (
context "context"
twiliocomms "github.com/twilio/twilio-comms-go/twilio"
client "github.com/twilio/twilio-comms-go/twilio/client"
option "github.com/twilio/twilio-comms-go/twilio/option"
)
func do() {
client := client.NewWithOptions(
option.WithBasicAuth(
"",
"",
),
)
request := &twiliocomms.DeviceRegistrationsRegisterRequest{
UserId: twiliocomms.String(
"comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8",
),
AppName: "limonade_app",
Token: "dqWD7WEC83K41WHyufTS7:APA91bFcrVaOLqKeJfSiEutJXX2Tr9wN_tYOwYd8rFA6mYUMBFqdz9n6k3v5EpFA_ukXD89hGqG3OarzbVfdjGnLOIAQfwbQcqJkjQWMrhwElrtU1y3JLDPfnjc0eTJLxzhyYvDFopEh",
Provider: twiliocomms.PushNotificationProviderFcm,
}
client.PushNotifications.DeviceRegistrations.Register(
context.TODO(),
request,
)
}
```
```php
',
authToken: '',
);
$client->pushNotifications->deviceRegistrations->register(
new DeviceRegistrationsRegisterRequest([
'userId' => 'comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8',
'appName' => 'limonade_app',
'token' => 'dqWD7WEC83K41WHyufTS7:APA91bFcrVaOLqKeJfSiEutJXX2Tr9wN_tYOwYd8rFA6mYUMBFqdz9n6k3v5EpFA_ukXD89hGqG3OarzbVfdjGnLOIAQfwbQcqJkjQWMrhwElrtU1y3JLDPfnjc0eTJLxzhyYvDFopEh',
'provider' => PushNotificationProvider::Fcm->value,
]),
);
```
```rb
require "twilio"
client = Twilio::Client.new(
account_id: "",
auth_token: ""
)
client.push_notifications.device_registrations.register(
user_id: "comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8",
app_name: "limonade_app",
token: "dqWD7WEC83K41WHyufTS7:APA91bFcrVaOLqKeJfSiEutJXX2Tr9wN_tYOwYd8rFA6mYUMBFqdz9n6k3v5EpFA_ukXD89hGqG3OarzbVfdjGnLOIAQfwbQcqJkjQWMrhwElrtU1y3JLDPfnjc0eTJLxzhyYvDFopEh",
provider: "FCM"
)
```
```bash
curl -X POST 'https://comms.twilio.com/v1/PushNotifications/DeviceRegistrations' \
--header 'Content-Type: application/json' \
--data '{
"userId": "your_user_id",
"appName": "your_app_name",
"token": "your_device_token",
"provider": "FCM"
}' \
-u $TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN
```
## Fetch a Device Registration
`GET https://comms.twilio.com/v1/PushNotifications/DeviceRegistrations/{deviceRegistrationId}`
Retrieve a single Device Registration resource by making an HTTP `GET` request to the Device Registration resource URI with the Device Registration ID.
### Path parameters
```json
[{"schema":{"x-twilio-version":1,"title":"DeviceRegistrationId","description":"A reference to a Device Registration.","type":"string","pattern":"^comms_device_registration_[a-hjkmnpqrstv-z0-9]{26,34}$","example":"comms_device_registration_01h9krwprkeee8fzqspvwy6nq8","refName":"DeviceRegistrationId","modelName":""},"x-twilio-version":1,"name":"deviceRegistrationId","in":"path","required":true}]
```
### Responses
Fetch a DeviceRegistration
```ts
import { TwilioClient } from "twilio-comms";
async function main() {
const client = new TwilioClient({
accountId: "",
authToken: "",
});
await client.pushNotifications.deviceRegistrations.fetch("comms_device_registration_01h9krwprkeee8fzqspvwy6nq8");
}
main();
```
```py
from twilio import TwilioComms
client = TwilioComms(
account_id="",
auth_token="",
)
client.push_notifications.device_registrations.fetch(
device_registration_id="comms_device_registration_01h9krwprkeee8fzqspvwy6nq8",
)
```
```cs
using TwilioComms;
using System.Threading.Tasks;
public partial class Examples
{
public async Task Example() {
var client = new TwilioCommsClient(
accountId: "",
authToken: ""
);
await client.PushNotifications.DeviceRegistrations.FetchAsync(
"comms_device_registration_01h9krwprkeee8fzqspvwy6nq8"
);
}
}
```
```java
package com.example.usage;
import com.twilio.comms.TwilioCommsClient;
public class Example {
public static void main(String[] args) {
TwilioCommsClient client = TwilioCommsClient
.builder()
.credentials("", "")
.build();
client.pushNotifications().deviceRegistrations().fetch("comms_device_registration_01h9krwprkeee8fzqspvwy6nq8");
}
}
```
```go
package example
import (
context "context"
client "github.com/twilio/twilio-comms-go/twilio/client"
option "github.com/twilio/twilio-comms-go/twilio/option"
)
func do() {
client := client.NewWithOptions(
option.WithBasicAuth(
"",
"",
),
)
client.PushNotifications.DeviceRegistrations.Fetch(
context.TODO(),
"comms_device_registration_01h9krwprkeee8fzqspvwy6nq8",
)
}
```
```php
',
authToken: '',
);
$client->pushNotifications->deviceRegistrations->fetch(
'comms_device_registration_01h9krwprkeee8fzqspvwy6nq8',
);
```
```rb
require "twilio"
client = Twilio::Client.new(
account_id: "",
auth_token: ""
)
client.push_notifications.device_registrations.fetch(device_registration_id: "comms_device_registration_01h9krwprkeee8fzqspvwy6nq8")
```
```bash
curl 'https://comms.twilio.com/v1/PushNotifications/DeviceRegistrations/{deviceRegistrationId}' \
-u $TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN
```
## List Device Registrations
`GET https://comms.twilio.com/v1/PushNotifications/DeviceRegistrations`
Returns a list of Device Registrations. The `userId` query parameter is required. You can optionally filter by `appName`.
### Query parameters
```json
[{"in":"query","name":"userId","required":true,"description":"Filter Device Registrations by `User.id` to retrieve only registrations for that User.","schema":{"x-twilio-version":1,"title":"PushNotificationUserId","description":"A reference to a Push Notification User.","type":"string","pattern":"^comms_pushnotificationuser_[0-7][a-hjkmnpqrstv-z0-9]{25,34}","example":"comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8","refName":"PushNotificationUserId","modelName":""}},{"in":"query","name":"appName","description":"Filter Device Registrations by their `appName`. Must be accompanied by the `userId` query parameter.","schema":{"x-twilio-version":1,"title":"PushNotificationAppName","description":"The name of the Push Notification `App`.","type":"string","pattern":"^[a-z0-9_]+$","minLength":1,"maxLength":64,"refName":"PushNotificationAppName","modelName":""}},{"in":"query","name":"pageToken","description":"The token to retrieve the next page of results.","schema":{"x-twilio-version":1,"description":"The token that identifies the page of resources to fetch.","title":"PageToken","type":"string","refName":"PageToken","modelName":""}},{"in":"query","name":"pageSize","description":"The number of resources to return in a page.","schema":{"x-twilio-version":1,"description":"Total number of items returned in a single page, the minimum is 1 and maximum is 1000. Default is 50.","title":"PageSize","type":"integer","minimum":1,"maximum":1000,"default":50,"example":50,"refName":"PageSize","modelName":""}}]
```
### Responses
List DeviceRegistrations
```ts
import { TwilioClient } from "twilio-comms";
async function main() {
const client = new TwilioClient({
accountId: "",
authToken: "",
});
await client.pushNotifications.deviceRegistrations.list({
userId: "comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8",
appName: "appName",
pageToken: "pageToken",
pageSize: 50,
});
}
main();
```
```py
from twilio import TwilioComms
client = TwilioComms(
account_id="",
auth_token="",
)
client.push_notifications.device_registrations.list(
user_id="comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8",
app_name="appName",
page_token="pageToken",
page_size=50,
)
```
```cs
using TwilioComms;
using System.Threading.Tasks;
using TwilioComms.PushNotifications;
public partial class Examples
{
public async Task Example() {
var client = new TwilioCommsClient(
accountId: "",
authToken: ""
);
await client.PushNotifications.DeviceRegistrations.ListAsync(
new DeviceRegistrationsListRequest {
UserId = "comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8",
AppName = "appName",
PageToken = "pageToken",
PageSize = 50
}
);
}
}
```
```java
package com.example.usage;
import com.twilio.comms.TwilioCommsClient;
import com.twilio.comms.resources.pushnotifications.deviceregistrations.requests.DeviceRegistrationsListRequest;
public class Example {
public static void main(String[] args) {
TwilioCommsClient client = TwilioCommsClient
.builder()
.credentials("", "")
.build();
client.pushNotifications().deviceRegistrations().list(
DeviceRegistrationsListRequest
.builder()
.userId("comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8")
.appName("appName")
.pageToken("pageToken")
.pageSize(50)
.build()
);
}
}
```
```go
package example
import (
context "context"
twiliocomms "github.com/twilio/twilio-comms-go/twilio"
client "github.com/twilio/twilio-comms-go/twilio/client"
option "github.com/twilio/twilio-comms-go/twilio/option"
)
func do() {
client := client.NewWithOptions(
option.WithBasicAuth(
"",
"",
),
)
request := &twiliocomms.DeviceRegistrationsListRequest{
UserId: "comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8",
AppName: twiliocomms.String(
"appName",
),
PageToken: twiliocomms.String(
"pageToken",
),
PageSize: twiliocomms.Int(
50,
),
}
client.PushNotifications.DeviceRegistrations.List(
context.TODO(),
request,
)
}
```
```php
',
authToken: '',
);
$client->pushNotifications->deviceRegistrations->list(
new DeviceRegistrationsListRequest([
'userId' => 'comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8',
'appName' => 'appName',
'pageToken' => 'pageToken',
'pageSize' => 50,
]),
);
```
```rb
require "twilio"
client = Twilio::Client.new(
account_id: "",
auth_token: ""
)
client.push_notifications.device_registrations.list(
user_id: "comms_pushnotificationuser_01h9krwprkeee8fzqspvwy6nq8",
app_name: "appName",
page_token: "pageToken",
page_size: 50
)
```
```bash
curl 'https://comms.twilio.com/v1/PushNotifications/DeviceRegistrations?pageSize=50' \
-u $TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN
```
## Delete a Device Registration
`DELETE https://comms.twilio.com/v1/PushNotifications/DeviceRegistrations/{deviceRegistrationId}`
Delete a Device Registration by making an HTTP `DELETE` request to the Device Registration resource URI with the Device Registration ID.
If successful, returns HTTP 202 (Accepted) with a resource ID to check the result.
Once deleted, the User no longer receives push notifications for the specified App until new devices are registered.
### Path parameters
```json
[{"schema":{"x-twilio-version":1,"title":"DeviceRegistrationId","description":"A reference to a Device Registration.","type":"string","pattern":"^comms_device_registration_[a-hjkmnpqrstv-z0-9]{26,34}$","example":"comms_device_registration_01h9krwprkeee8fzqspvwy6nq8","refName":"DeviceRegistrationId","modelName":""},"x-twilio-version":1,"name":"deviceRegistrationId","in":"path","required":true}]
```
### Responses
Delete a DeviceRegistration
```ts
import { TwilioClient } from "twilio-comms";
async function main() {
const client = new TwilioClient({
accountId: "",
authToken: "",
});
await client.pushNotifications.deviceRegistrations.delete("comms_device_registration_01h9krwprkeee8fzqspvwy6nq8");
}
main();
```
```py
from twilio import TwilioComms
client = TwilioComms(
account_id="",
auth_token="",
)
client.push_notifications.device_registrations.delete(
device_registration_id="comms_device_registration_01h9krwprkeee8fzqspvwy6nq8",
)
```
```cs
using TwilioComms;
using System.Threading.Tasks;
public partial class Examples
{
public async Task Example() {
var client = new TwilioCommsClient(
accountId: "",
authToken: ""
);
await client.PushNotifications.DeviceRegistrations.DeleteAsync(
"comms_device_registration_01h9krwprkeee8fzqspvwy6nq8"
);
}
}
```
```java
package com.example.usage;
import com.twilio.comms.TwilioCommsClient;
public class Example {
public static void main(String[] args) {
TwilioCommsClient client = TwilioCommsClient
.builder()
.credentials("", "")
.build();
client.pushNotifications().deviceRegistrations().delete("comms_device_registration_01h9krwprkeee8fzqspvwy6nq8");
}
}
```
```go
package example
import (
context "context"
client "github.com/twilio/twilio-comms-go/twilio/client"
option "github.com/twilio/twilio-comms-go/twilio/option"
)
func do() {
client := client.NewWithOptions(
option.WithBasicAuth(
"",
"",
),
)
client.PushNotifications.DeviceRegistrations.Delete(
context.TODO(),
"comms_device_registration_01h9krwprkeee8fzqspvwy6nq8",
)
}
```
```php
',
authToken: '',
);
$client->pushNotifications->deviceRegistrations->delete(
'comms_device_registration_01h9krwprkeee8fzqspvwy6nq8',
);
```
```rb
require "twilio"
client = Twilio::Client.new(
account_id: "",
auth_token: ""
)
client.push_notifications.device_registrations.delete(device_registration_id: "comms_device_registration_01h9krwprkeee8fzqspvwy6nq8")
```
```bash
curl -X DELETE 'https://comms.twilio.com/v1/PushNotifications/DeviceRegistrations/{deviceRegistrationId}' \
-u $TWILIO_ACCOUNT_SID:$TWILIO_AUTH_TOKEN
```