CognitoIdentityProvider / Client / confirm_sign_up



This public API operation provides a code that Amazon Cognito sent to your user when they signed up in your user pool via the SignUp API operation. After your user enters their code, they confirm ownership of the email address or phone number that they provided, and their user account becomes active. Depending on your user pool configuration, your users will receive their confirmation code in an email or SMS message.

Local users who signed up in your user pool are the only type of user who can confirm sign-up with a code. Users who federate through an external identity provider (IdP) have already been confirmed by their IdP. Administrator-created users, users created with the AdminCreateUser API operation, confirm their accounts when they respond to their invitation email message and choose a password. They do not receive a confirmation code. Instead, they receive a temporary password.


Amazon Cognito doesn’t evaluate 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.

See also: AWS API Documentation

Request Syntax

response = client.confirm_sign_up(
        'AnalyticsEndpointId': 'string'
        'IpAddress': 'string',
        'EncodedData': 'string'
        'string': 'string'
  • ClientId (string) –


    The ID of the app client associated with the user pool.

  • SecretHash (string) – 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.

  • Username (string) –


    The username 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.

  • ConfirmationCode (string) –


    The confirmation code sent by a user’s request to confirm registration.

  • ForceAliasCreation (boolean) – Boolean to be specified to force user confirmation irrespective of existing alias. By default set to False. If this parameter is set to True and the phone number/email used for sign up confirmation already exists as an alias with a different user, the API call will migrate the alias from the previous user to the newly created user being confirmed. If set to False, the API will throw an AliasExistsException error.

  • AnalyticsMetadata (dict) –

    The Amazon Pinpoint analytics metadata for collecting metrics for ConfirmSignUp calls.

    • AnalyticsEndpointId (string) –

      The endpoint ID.

  • UserContextData (dict) –

    Contextual data about your user session, such as the device fingerprint, IP address, or location. Amazon Cognito advanced security 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.

    • IpAddress (string) –

      The source IP address of your user’s device.

    • EncodedData (string) –

      Encoded device-fingerprint details that your app collected with the Amazon Cognito context data collection library. For more information, see Adding user device and session data to API requests.

  • ClientMetadata (dict) –

    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 Lambda functions to user pool triggers. When you use the ConfirmSignUp API action, Amazon Cognito invokes the function that is assigned to the post confirmation trigger. When Amazon Cognito invokes this function, 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 ConfirmSignUp request. In your function code in Lambda, you can process the clientMetadata value to enhance your workflow for your specific needs.

    For more information, see Customizing user pool Workflows with Lambda Triggers in the Amazon Cognito Developer Guide.


    When you use the ClientMetadata parameter, remember that Amazon Cognito won’t do the following:

    • Store the ClientMetadata value. This data is available only to 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 use Amazon Cognito to provide sensitive information.

    • (string) –

      • (string) –

Return type:



Response Syntax


Response Structure

  • (dict) –

    Represents the response from the server for the registration confirmation.


  • CognitoIdentityProvider.Client.exceptions.ResourceNotFoundException

  • CognitoIdentityProvider.Client.exceptions.InvalidParameterException

  • CognitoIdentityProvider.Client.exceptions.UnexpectedLambdaException

  • CognitoIdentityProvider.Client.exceptions.UserLambdaValidationException

  • CognitoIdentityProvider.Client.exceptions.NotAuthorizedException

  • CognitoIdentityProvider.Client.exceptions.TooManyFailedAttemptsException

  • CognitoIdentityProvider.Client.exceptions.CodeMismatchException

  • CognitoIdentityProvider.Client.exceptions.ExpiredCodeException

  • CognitoIdentityProvider.Client.exceptions.InvalidLambdaResponseException

  • CognitoIdentityProvider.Client.exceptions.AliasExistsException

  • CognitoIdentityProvider.Client.exceptions.TooManyRequestsException

  • CognitoIdentityProvider.Client.exceptions.LimitExceededException

  • CognitoIdentityProvider.Client.exceptions.UserNotFoundException

  • CognitoIdentityProvider.Client.exceptions.InternalErrorException

  • CognitoIdentityProvider.Client.exceptions.ForbiddenException