---
title: "Authenticate endpoint for signing in to an existing account."
method: GET
path: "/iam/signin/{provider}"
tags: ["auth"]
---

# Authenticate endpoint for signing in to an existing account.

`GET /iam/signin/{provider}`

## Path parameters

- `provider` 'github' | 'google', required

## Query parameters

- `post_auth_action` 'msteams-auth' | 'aws-marketplace' | 'google-marketplace' | 'mcp'
- `post_auth_state` string
- `post_auth_token` string

## Other responses

- `307` — App redirect.
- `403` — User unauthorized to perform this action.
- `4XX` — Client error.
- `5XX` — Server error.

---

[API](https://skmtc.net/scalr/apis/scalr-iacp-api.md) · [All operations](https://skmtc.net/scalr/apis/scalr-iacp-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/scalr/scalr-iacp-api/revisions/fc927526ad12/schema)