explicitAuthFlows

The authentication flows that you want your user pool client to support. For each app client in your user pool, you can sign in your users with any combination of one or more flows, including with a user name and Secure Remote Password (SRP), a user name and password, or a custom authentication process that you define with Lambda functions.

If you don't specify a value for ExplicitAuthFlows , your app client supports ALLOW_REFRESH_TOKEN_AUTH , ALLOW_USER_SRP_AUTH , and ALLOW_CUSTOM_AUTH . The values for authentication flow options include the following.

• ALLOW_USER_AUTH : Enable selection-based sign-in with USER_AUTH . This setting covers username-password, secure remote password (SRP), passwordless, and passkey authentication. This authentiation flow can do username-password and SRP authentication without other ExplicitAuthFlows permitting them. For example users can complete an SRP challenge through USER_AUTH without the flow USER_SRP_AUTH being active for the app client. This flow doesn't include CUSTOM_AUTH . To activate this setting, your user pool must be in the Essentials tier or higher.

• ALLOW_ADMIN_USER_PASSWORD_AUTH : Enable admin based user password authentication flow ADMIN_USER_PASSWORD_AUTH . This setting replaces the ADMIN_NO_SRP_AUTH setting. With this authentication flow, your app passes a user name and password to Amazon Cognito in the request, instead of using the Secure Remote Password (SRP) protocol to securely transmit the password.

• ALLOW_CUSTOM_AUTH : Enable Lambda trigger based authentication.

• ALLOW_USER_PASSWORD_AUTH : Enable user password-based authentication. In this flow, Amazon Cognito receives the password in the request instead of using the SRP protocol to verify passwords.

• ALLOW_USER_SRP_AUTH : Enable SRP-based authentication.

• ALLOW_REFRESH_TOKEN_AUTH : Enable authflow to refresh tokens. In some environments, you will see the values ADMIN_NO_SRP_AUTH , CUSTOM_AUTH_FLOW_ONLY , or USER_PASSWORD_AUTH . You can't assign these legacy ExplicitAuthFlows values to user pool clients at the same time as values that begin with ALLOW_ , like ALLOW_USER_SRP_AUTH .