# Authentication B2B

User authentication and session management for B2B integrations

 - [POST /auth](https://developer.alteg.io/en/b2b-v1/openapi/authentication-b2b/authorize_user.md): When a user changes their password, their API key is regenerated. As a result, reauthorization is required using the new API key. | Attribute | Type | Description | | --- | --- | --- | | login | stri