AWS Tools for Windows PowerShell
Command Reference

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Synopsis

Calls the Amazon Cognito Identity Provider InitiateAuth API operation.

Syntax

Start-CGIPAuth
-ClientId <String>
-AnalyticsMetadata_AnalyticsEndpointId <String>
-AuthFlow <AuthFlowType>
-AuthParameter <Hashtable>
-ClientMetadata <Hashtable>
-UserContextData_EncodedData <String>
-UserContextData_IpAddress <String>
-Session <String>
-Select <String>
-PassThru <SwitchParameter>
-Force <SwitchParameter>
-ClientConfig <AmazonCognitoIdentityProviderConfig>

Description

Declares an authentication flow and initiates sign-in for a user in the Amazon Cognito user directory. Amazon Cognito might respond with an additional challenge or an AuthenticationResult that contains the outcome of a successful authentication. You can't sign in a user with a federated IdP with InitiateAuth. For more information, see Authentication. 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. 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.

Parameters

-AnalyticsMetadata_AnalyticsEndpointId <String>
The endpoint ID. Information that you want to pass to Amazon Pinpoint about where to send notifications.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-AuthFlow <AuthFlowType>
The authentication flow that you want to initiate. Each AuthFlow has linked AuthParameters that you must submit. The following are some example flows.
USER_AUTH
The entry point for choice-based authentication with passwords, one-time passwords, and WebAuthn authenticators. Request a preferred authentication type or review available authentication types. From the offered authentication types, select one in a challenge response and then authenticate with that method in an additional challenge response. To activate this setting, your user pool must be in the Essentials tier or higher.
USER_SRP_AUTH
Username-password authentication with the Secure Remote Password (SRP) protocol. For more information, see Use SRP password verification in custom authentication flow.
REFRESH_TOKEN_AUTH and REFRESH_TOKEN
Receive new ID and access tokens when you pass a REFRESH_TOKEN parameter with a valid refresh token as the value. For more information, see Using the refresh token.
CUSTOM_AUTH
Custom authentication with Lambda triggers. For more information, see Custom authentication challenge Lambda triggers.
USER_PASSWORD_AUTH
Client-side username-password authentication with the password sent directly in the request. For more information about client-side and server-side authentication, see SDK authorization models.
ADMIN_USER_PASSWORD_AUTH is a flow type of AdminInitiateAuth and isn't valid for InitiateAuth. ADMIN_NO_SRP_AUTH is a legacy server-side username-password flow and isn't valid for InitiateAuth.
Required?True
Position?Named
Accept pipeline input?True (ByPropertyName)
-AuthParameter <Hashtable>
The authentication parameters. These are inputs corresponding to the AuthFlow that you're invoking.The required values are specific to the InitiateAuthRequest$AuthFlow.The following are some authentication flows and their parameters. Add a SECRET_HASH parameter if your app client has a client secret.
  • USER_AUTH: USERNAME (required), PREFERRED_CHALLENGE. If you don't provide a value for PREFERRED_CHALLENGE, Amazon Cognito responds with the AvailableChallenges parameter that specifies the available sign-in methods.
  • USER_SRP_AUTH: USERNAME (required), SRP_A (required), DEVICE_KEY.
  • USER_PASSWORD_AUTH: USERNAME (required), PASSWORD (required), DEVICE_KEY.
  • REFRESH_TOKEN_AUTH/REFRESH_TOKEN: REFRESH_TOKEN (required), DEVICE_KEY.
  • 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.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesAuthParameters
-ClientConfig <AmazonCognitoIdentityProviderConfig>
Amazon.PowerShell.Cmdlets.CGIP.AmazonCognitoIdentityProviderClientCmdlet.ClientConfig
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-ClientId <String>
The ID of the app client that your user wants to sign in to.
Required?True
Position?1
Accept pipeline input?True (ByValue, ByPropertyName)
-ClientMetadata <Hashtable>
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 send an InitiateAuth request, 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 sign-up
  • Pre authentication
  • User migration
When Amazon Cognito invokes the functions for these triggers, it passes a JSON payload as input to the function. This payload contains a validationData attribute with the data that you assigned to the ClientMetadata parameter in your InitiateAuth request. In your function, validationData can contribute to operations that require data that isn't in the default payload.InitiateAuth requests invokes the following triggers without ClientMetadata as input.
  • Post authentication
  • Custom message
  • Pre token generation
  • Create auth challenge
  • Define auth challenge
  • Custom email sender
  • Custom SMS sender
For more information, see Using Lambda triggers in the Amazon Cognito Developer Guide.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 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.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-Force <SwitchParameter>
This parameter overrides confirmation prompts to force the cmdlet to continue its operation. This parameter should always be used with caution.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-PassThru <SwitchParameter>
Changes the cmdlet behavior to return the value passed to the ClientId parameter. The -PassThru parameter is deprecated, use -Select '^ClientId' instead. This parameter will be removed in a future version.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-Select <String>
Use the -Select parameter to control the cmdlet output. The default value is '*'. Specifying -Select '*' will result in the cmdlet returning the whole service response (Amazon.CognitoIdentityProvider.Model.InitiateAuthResponse). Specifying the name of a property of type Amazon.CognitoIdentityProvider.Model.InitiateAuthResponse will result in that property being returned. Specifying -Select '^ParameterName' will result in the cmdlet returning the selected cmdlet parameter value.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-Session <String>
The optional session ID from a ConfirmSignUp API request. You can sign in a user directly from the sign-up process with the USER_AUTH authentication flow. When you pass the session ID to InitiateAuth, Amazon Cognito assumes the SMS or email message one-time verification password from ConfirmSignUp as the primary authentication factor. You're not required to submit this code a second time. This option is only valid for users who have confirmed their sign-up and are signing in for the first time within the authentication flow session duration of the session ID.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-UserContextData_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.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-UserContextData_IpAddress <String>
The source IP address of your user's device.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)

Common Credential and Region Parameters

-AccessKey <String>
The AWS access key for the user account. This can be a temporary access key if the corresponding session token is supplied to the -SessionToken parameter.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesAK
-Credential <AWSCredentials>
An AWSCredentials object instance containing access and secret key information, and optionally a token for session-based credentials.
Required?False
Position?Named
Accept pipeline input?True (ByValue, ByPropertyName)
-EndpointUrl <String>
The endpoint to make the call against.Note: This parameter is primarily for internal AWS use and is not required/should not be specified for normal usage. The cmdlets normally determine which endpoint to call based on the region specified to the -Region parameter or set as default in the shell (via Set-DefaultAWSRegion). Only specify this parameter if you must direct the call to a specific custom endpoint.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
-NetworkCredential <PSCredential>
Used with SAML-based authentication when ProfileName references a SAML role profile. Contains the network credentials to be supplied during authentication with the configured identity provider's endpoint. This parameter is not required if the user's default network identity can or should be used during authentication.
Required?False
Position?Named
Accept pipeline input?True (ByValue, ByPropertyName)
-ProfileLocation <String>
Used to specify the name and location of the ini-format credential file (shared with the AWS CLI and other AWS SDKs)If this optional parameter is omitted this cmdlet will search the encrypted credential file used by the AWS SDK for .NET and AWS Toolkit for Visual Studio first. If the profile is not found then the cmdlet will search in the ini-format credential file at the default location: (user's home directory)\.aws\credentials.If this parameter is specified then this cmdlet will only search the ini-format credential file at the location given.As the current folder can vary in a shell or during script execution it is advised that you use specify a fully qualified path instead of a relative path.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesAWSProfilesLocation, ProfilesLocation
-ProfileName <String>
The user-defined name of an AWS credentials or SAML-based role profile containing credential information. The profile is expected to be found in the secure credential file shared with the AWS SDK for .NET and AWS Toolkit for Visual Studio. You can also specify the name of a profile stored in the .ini-format credential file used with the AWS CLI and other AWS SDKs.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesStoredCredentials, AWSProfileName
-Region <Object>
The system name of an AWS region or an AWSRegion instance. This governs the endpoint that will be used when calling service operations. Note that the AWS resources referenced in a call are usually region-specific.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesRegionToCall
-SecretKey <String>
The AWS secret key for the user account. This can be a temporary secret key if the corresponding session token is supplied to the -SessionToken parameter.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesSK, SecretAccessKey
-SessionToken <String>
The session token if the access and secret keys are temporary session-based credentials.
Required?False
Position?Named
Accept pipeline input?True (ByPropertyName)
AliasesST

Outputs

Amazon.CognitoIdentityProvider.Model.InitiateAuthResponse
This cmdlet returns an Amazon.CognitoIdentityProvider.Model.InitiateAuthResponse object containing multiple properties.
Developer Guide
Service API Reference
AWS Tools for PowerShell User Guide

Supported Version

AWS Tools for PowerShell: 2.x.y.z