Authenticates the user with AWS Cognito using OIDC redirect
This step authenticates the user by redirecting them to AWS Cognito–an external identity provider–for authentication using the OIDC Authorization Code flow. It is used for Just-In-Time (JIT) migration scenarios where users are gradually migrated from Cognito to Mosaic as they log in.
Before using this step, configure a Cognito connection in Integration Hub.
When the journey reaches this step, the user is redirected to Cognito to authenticate. After successful authentication, Cognito redirects the user back to Mosaic using the configured callback URL. The authentication result is stored in the output variable and can be used in subsequent steps (e.g., to create a user in Mosaic).
If the authentication fails, the journey proceeds to the failure branch (if specified); otherwise, the journey is aborted and an error is sent to the client.
| Field | Description |
|---|---|
| Cognito integration | The Cognito connector to use for authentication, as configured in Integration Hub. |
| Callback URL | The URL where Cognito redirects the user after authentication. |
| Scope | OAuth scopes to request from Cognito. Default: openid profile email. |
| Response mode | Determines if the authorization response is returned in a query or a form post. |
| Advanced OIDC configuration | Allows configuring ACR values, claims, and additional authorize parameters. |
| Output variable | Name of the variable that stores the authentication result returned by Cognito. |
| Error output variable | Name of the variable that stores any errors returned by the step. |
| Failure behavior | Determines the behavior in case of failure, which either aborts the journey or proceeds to a failure branch of the control flow (default). |
This step can be configured to record step input and output data, or a custom payload, which is then surfaced in journey events in Journey Analytics for diagnostic purposes. For details, see Additional data reporting.
Consider a migration journey where users authenticate via Cognito's login page. The Cognito OIDC Authentication step redirects the user to Cognito. After successful authentication, the output variable (cognito_oidc_output) contains user information, including ID token and user_info, that can be used to create or update a user in Mosaic using the Create user step.