Admin Initiate Auth

cognitoidentityprovider_admin_initiate_auth

R Documentation

Initiates the authentication flow, as an administrator

Description

Initiates the authentication flow, as an administrator.

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.

Amazon Cognito evaluates Identity and Access Management (IAM) policies in requests for this API operation. For this operation, you must use IAM credentials to authorize requests, and you must grant yourself the corresponding IAM permission in a policy.

Learn more

• Signing Amazon Web Services API Requests

• Using the Amazon Cognito user pools API and user pool endpoints

Usage

cognitoidentityprovider_admin_initiate_auth(UserPoolId, ClientId,
  AuthFlow, AuthParameters, ClientMetadata, AnalyticsMetadata,
  ContextData)

Arguments

UserPoolId

[required] The ID of the Amazon Cognito user pool.

ClientId

[required] The app client ID.

AuthFlow

[required] The authentication flow for this call to run. The API action will depend on this value. For example:

• REFRESH_TOKEN_AUTH will take in a valid refresh token and return new tokens.

• USER_SRP_AUTH will take in USERNAME and SRP_A and return the Secure Remote Password (SRP) protocol variables to be used for next challenge execution.

• ADMIN_USER_PASSWORD_AUTH will take in USERNAME and PASSWORD and return the next challenge or tokens.

Valid values include:

• USER_SRP_AUTH: Authentication flow for the Secure Remote Password (SRP) protocol.

• REFRESH_TOKEN_AUTH/REFRESH_TOKEN: Authentication flow for refreshing the access token and ID token by supplying a valid refresh token.

• CUSTOM_AUTH: Custom authentication flow.

• ADMIN_NO_SRP_AUTH: Non-SRP authentication flow; you can pass in the USERNAME and PASSWORD directly if the flow is enabled for calling the app client.

• ADMIN_USER_PASSWORD_AUTH: Admin-based user password authentication. This replaces the ADMIN_NO_SRP_AUTH authentication flow. In this flow, Amazon Cognito receives the password in the request instead of using the SRP process to verify passwords.

AuthParameters

The authentication parameters. These are inputs corresponding to the AuthFlow that you're invoking. The required values depend on the value of AuthFlow:

• For USER_SRP_AUTH: USERNAME (required), SRP_A (required), SECRET_HASH (required if the app client is configured with a client secret), DEVICE_KEY.

• For ADMIN_USER_PASSWORD_AUTH: USERNAME (required), PASSWORD (required), SECRET_HASH (required if the app client is configured with a client secret), DEVICE_KEY.

• For REFRESH_TOKEN_AUTH/REFRESH_TOKEN: REFRESH_TOKEN (required), SECRET_HASH (required if the app client is configured with a client secret), DEVICE_KEY.

• For CUSTOM_AUTH: USERNAME (required), SECRET_HASH (if app client is configured with client secret), DEVICE_KEY. To start the authentication flow with password verification, include ChallengeName: SRP_A and ⁠SRP_A: (The SRP_A Value)⁠.

For more information about SECRET_HASH, see Computing secret hash values. For information about DEVICE_KEY, see Working with user devices in your user pool.

ClientMetadata

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

You create custom workflows by assigning Lambda functions to user pool triggers. When you use the AdminInitiateAuth API action, Amazon Cognito invokes the Lambda functions that are specified for various triggers. The ClientMetadata value is passed as input to the functions for only the following triggers:

• Pre signup

• Pre authentication

• User migration

When Amazon Cognito invokes the functions for these triggers, it passes a JSON payload, which the function receives as input. This payload contains a validationData attribute, which provides the data that you assigned to the ClientMetadata parameter in your AdminInitiateAuth request. In your function code in Lambda, you can process the validationData value to enhance your workflow for your specific needs.

When you use the AdminInitiateAuth API action, Amazon Cognito also invokes the functions for the following triggers, but it doesn't provide the ClientMetadata value as input:

• Post authentication

• Custom message

• Pre token generation

• Create auth challenge

• Define auth challenge

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.

AnalyticsMetadata

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

ContextData

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.

Value

A list with the following syntax:

list(
  ChallengeName = "SMS_MFA"|"SOFTWARE_TOKEN_MFA"|"SELECT_MFA_TYPE"|"MFA_SETUP"|"PASSWORD_VERIFIER"|"CUSTOM_CHALLENGE"|"DEVICE_SRP_AUTH"|"DEVICE_PASSWORD_VERIFIER"|"ADMIN_NO_SRP_AUTH"|"NEW_PASSWORD_REQUIRED",
  Session = "string",
  ChallengeParameters = list(
    "string"
  ),
  AuthenticationResult = list(
    AccessToken = "string",
    ExpiresIn = 123,
    TokenType = "string",
    RefreshToken = "string",
    IdToken = "string",
    NewDeviceMetadata = list(
      DeviceKey = "string",
      DeviceGroupKey = "string"
    )
  )
)

Request syntax

svc$admin_initiate_auth(
  UserPoolId = "string",
  ClientId = "string",
  AuthFlow = "USER_SRP_AUTH"|"REFRESH_TOKEN_AUTH"|"REFRESH_TOKEN"|"CUSTOM_AUTH"|"ADMIN_NO_SRP_AUTH"|"USER_PASSWORD_AUTH"|"ADMIN_USER_PASSWORD_AUTH",
  AuthParameters = list(
    "string"
  ),
  ClientMetadata = list(
    "string"
  ),
  AnalyticsMetadata = list(
    AnalyticsEndpointId = "string"
  ),
  ContextData = list(
    IpAddress = "string",
    ServerName = "string",
    ServerPath = "string",
    HttpHeaders = list(
      list(
        headerName = "string",
        headerValue = "string"
      )
    ),
    EncodedData = "string"
  )
)