---
title: "login with email address"
method: POST
path: "/user/sign_in"
tags: ["Users"]
---

# login with email address

`POST /user/sign_in`

## Query parameters

- `user[email]` string, required
- `user[password]` string, password, required
- `user[app]` 'questionmark-app' | 'checkit'
- `plan` string

## Response `200`

login failed (`success` is `false`) or succeeded

- object
  - `success` boolean
  - `error` string — login failure reason (only present when `success` is `false`)
  - `user` User
    - `id` integer
    - `retailer_ids` integer[] — preferred retailers
    - `email` string — email address (only for email login)
    - `name` string — name (only for owners)
    - `created` string

---

[API](https://skmtc.dev/thequestionmark/apis/questionmark-api-v1-2.md) · [All operations](https://skmtc.dev/thequestionmark/apis/questionmark-api-v1-2/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/thequestionmark/questionmark-api-v1-2/revisions/936ff09e6fa1/schema)