Request Syntax Request Parameters Response Syntax Response Elements Errors Examples See Also

ForgotPassword

Sends a password-reset confirmation code for the currently signed-in user.

For the Username parameter, you can use the username or user alias.

Amazon Cognito sends the code with the delivery method specified by your user pool CreateUserPool:AccountRecoverySetting configuration. For more information, see Recovering user accounts in the Amazon Cognito Developer Guide. Users must submit the code in a ConfirmForgotPassword request.

If neither a verified phone number nor a verified email exists, Amazon Cognito responds with an InvalidParameterException error . If your app client has a client secret and you don't provide a SECRET_HASH parameter, this API returns NotAuthorizedException.

To use this API operation, your user pool must have self-service account recovery configured with AdminCreateUserConfigType:AllowAdminCreateUserOnly set to false for your user pool. Use AdminSetUserPassword if you manage passwords as an administrator.

Note

Amazon Cognito doesn't evaluate Amazon Identity and Access Management (IAM) policies in requests for this API operation. For this operation, you can't use IAM credentials to authorize requests, and you can't grant IAM permissions in policies. For more information about authorization models in Amazon Cognito, see Using the Amazon Cognito user pools API and user pool endpoints.

Note

This action might generate an SMS text message. Starting June 1, 2021, US telecom carriers require you to register an origination phone number before you can send SMS messages to US phone numbers. If you use SMS text messages in Amazon Cognito, you must register a phone number with Amazon Pinpoint. Amazon Cognito uses the registered number automatically. Otherwise, Amazon Cognito users who must receive SMS messages might not be able to sign up, activate their accounts, or sign in.

If you have never used SMS text messages with Amazon Cognito or any other Amazon Web Services service, Amazon Simple Notification Service might place your account in the SMS sandbox. In sandbox mode , you can send messages only to verified phone numbers. After you test your app while in the sandbox environment, you can move out of the sandbox and into production. For more information, see SMS message settings for Amazon Cognito user pools in the Amazon Cognito Developer Guide.

Request Syntax


{
   "AnalyticsMetadata": { 
      "AnalyticsEndpointId": "string"
   },
   "ClientId": "string",
   "ClientMetadata": { 
      "string" : "string" 
   },
   "SecretHash": "string",
   "UserContextData": { 
      "EncodedData": "string",
      "IpAddress": "string"
   },
   "Username": "string"
}

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.

AnalyticsMetadata

Information that supports analytics outcomes with Amazon Pinpoint, including the user's endpoint ID. The endpoint ID is a destination for Amazon Pinpoint push notifications, for example a device identifier, email address, or phone number.

Type: AnalyticsMetadataType object

Required: No

ClientId

The ID of the user pool app client associated with the current signed-in user.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 128.

Pattern: [\w+]+

Required: Yes

ClientMetadata

A map of custom key-value pairs that you can provide as input for any custom workflows that this action triggers.

You create custom workflows by assigning Amazon Lambda functions to user pool triggers. When you use the ForgotPassword API action, Amazon Cognito invokes any functions that are assigned to the following triggers: pre sign-up, custom message, and user migration. When Amazon Cognito invokes any of these functions, it passes a JSON payload, which the function receives as input. This payload contains a clientMetadata attribute, which provides the data that you assigned to the ClientMetadata parameter in your ForgotPassword request. In your function code in Amazon Lambda, you can process the clientMetadata value to enhance your workflow for your specific needs.

For more information, see Using Lambda triggers in the Amazon Cognito Developer Guide.

Note

When you use the ClientMetadata parameter, note that Amazon Cognito won't do the following:

Store the ClientMetadata value. This data is available only to Amazon Lambda triggers that are assigned to a user pool to support custom workflows. If your user pool configuration doesn't include triggers, the ClientMetadata parameter serves no purpose.
Validate the ClientMetadata value.
Encrypt the ClientMetadata value. Don't send sensitive information in this parameter.

Type: String to string map

Key Length Constraints: Minimum length of 0. Maximum length of 131072.

Value Length Constraints: Minimum length of 0. Maximum length of 131072.

Required: No

SecretHash

A keyed-hash message authentication code (HMAC) calculated using the secret key of a user pool client and username plus the client ID in the message. For more information about SecretHash, see Computing secret hash values.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 128.

Pattern: [\w+=/]+

Required: No

UserContextData

Contextual data about your user session like the device fingerprint, IP address, or location. Amazon Cognito threat protection evaluates the risk of an authentication event based on the context that your app generates and passes to Amazon Cognito when it makes API requests.

For more information, see Collecting data for threat protection in applications.

Type: UserContextDataType object

Required: No

Username

The name of the user that you want to query or modify. The value of this parameter is typically your user's username, but it can be any of their alias attributes. If username isn't an alias attribute in your user pool, this value must be the sub of a local user or the username of a user from a third-party IdP.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 128.

Pattern: [\p{L}\p{M}\p{S}\p{N}\p{P}]+

Required: Yes

Response Syntax


{
   "CodeDeliveryDetails": { 
      "AttributeName": "string",
      "DeliveryMedium": "string",
      "Destination": "string"
   }
}

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

CodeDeliveryDetails

Information about the phone number or email address that Amazon Cognito sent the password-recovery code to.

Type: CodeDeliveryDetailsType object

Errors

For information about the errors that are common to all actions, see Common Errors.

CodeDeliveryFailureException

This exception is thrown when a verification code fails to deliver successfully.

HTTP Status Code: 400

ForbiddenException

This exception is thrown when Amazon WAF doesn't allow your request based on a web ACL that's associated with your user pool.

HTTP Status Code: 400

InternalErrorException

This exception is thrown when Amazon Cognito encounters an internal error.

HTTP Status Code: 500

InvalidEmailRoleAccessPolicyException

This exception is thrown when Amazon Cognito isn't allowed to use your email identity. HTTP status code: 400.

HTTP Status Code: 400

InvalidLambdaResponseException

This exception is thrown when Amazon Cognito encounters an invalid Amazon Lambda response.

HTTP Status Code: 400

InvalidParameterException

This exception is thrown when the Amazon Cognito service encounters an invalid parameter.

HTTP Status Code: 400

InvalidSmsRoleAccessPolicyException

This exception is returned when the role provided for SMS configuration doesn't have permission to publish using Amazon SNS.

HTTP Status Code: 400

InvalidSmsRoleTrustRelationshipException

This exception is thrown when the trust relationship is not valid for the role provided for SMS configuration. This can happen if you don't trust cognito-idp.amazonaws.com or the external ID provided in the role does not match what is provided in the SMS configuration for the user pool.

HTTP Status Code: 400

LimitExceededException

This exception is thrown when a user exceeds the limit for a requested Amazon resource.

HTTP Status Code: 400

NotAuthorizedException

This exception is thrown when a user isn't authorized.

HTTP Status Code: 400

ResourceNotFoundException

This exception is thrown when the Amazon Cognito service can't find the requested resource.

HTTP Status Code: 400

TooManyRequestsException

This exception is thrown when the user has made too many requests for a given operation.

HTTP Status Code: 400

UnexpectedLambdaException

This exception is thrown when Amazon Cognito encounters an unexpected exception with Amazon Lambda.

HTTP Status Code: 400

UserLambdaValidationException

This exception is thrown when the Amazon Cognito service encounters a user validation exception with the Amazon Lambda service.

HTTP Status Code: 400

UserNotFoundException

This exception is thrown when a user isn't found.

HTTP Status Code: 400

Examples

Example

The following example request requests a forgot-password code for the user "testuser". Amazon Cognito responds with confirmation that it has delivered the code in an email message.

Sample Request


POST HTTP/1.1
Host: cognito-idp.us-west-2.amazonaws.com
X-Amz-Date: 20230613T200059Z
Accept-Encoding: gzip, deflate, br
X-Amz-Target: AWSCognitoIdentityProviderService.ForgotPassword
User-Agent: <UserAgentString>
Authorization: AWS4-HMAC-SHA256 Credential=<Credential>, SignedHeaders=<Headers>, Signature=<Signature>
Content-Length: <PayloadSizeBytes>
{
   "ClientId": "1example23456789",   
   "Username": "testuser"
}

Sample Response


HTTP/1.1 200 OK
Date: Tue, 13 Jun 2023 20:00:59 GMT
Content-Type: application/x-amz-json-1.0
Content-Length: <PayloadSizeBytes>
x-amzn-requestid: a1b2c3d4-e5f6-a1b2-c3d4-EXAMPLE11111
Connection: keep-alive
{
   "CodeDeliveryDetails": {
        "AttributeName": "email",
        "DeliveryMedium": "EMAIL",
        "Destination": "a***@e***"
    }
}