# 既有登录用户ID上传

客户从登录用户ID的视角认为有一些用户是既有用户，而不是新用户。

GrowingIO提供此接口来定义某一些登录用户ID为既有用户，并不是新用户。同时，还提供上传登录用户的注册时间，来告诉GrowingIO该用户成为新用户的时间。

## 获取认证码

auth的计算需要将`loginUserId`的值拼接成`keyArray，`多条使用`逗号`分隔，如上述示例中的keyArray为`abcdef,bcdefg`。Java代码示例如下：

{% code title="java" %}

```java
/**
 * projectKeyId: 项目ID
 * secretKey: 项目私钥
 * keyArray: loginUserId用逗号拼接的字符串
*/ 
public String authToken(String projectKeyId, String secretKey, String keyArray) throws Exception {
    String message = "projectId="+projectKeyId+"&loginUserId="+keyArray;
    Mac hmac = Mac.getInstance("HmacSHA256");
    hmac.init(new SecretKeySpec(secretKey.getBytes("UTF-8"), "HmacSHA256"));
    byte[] signature = hmac.doFinal(message.getBytes("UTF-8"));
    return Hex.encodeHexString(signature);
}
```

{% endcode %}

## 接口定义

#### URL

<https://data.growingio.com/{ai}/user/exist>

#### 请求类型

POST

#### 参数说明

{% tabs %}
{% tab title="请求参数" %}

|  请求头参数       | 类型     | 是否必传 | 说明               |
| ------------ | ------ | ---- | ---------------- |
| Access-Token | string | 是    | Public Key，项目公钥  |
| Content-Type | string | 是    | application/json |

| 路径参数 | 类型     | 是否必传 | 说明    |
| ---- | ------ | ---- | ----- |
| ai   | string | 是    | 项目ID。 |

| 查询参数 | 类型     | 是否必传 | 说明        |
| ---- | ------ | ---- | --------- |
| auth | string | 是    | 针对数据生成的认证 |

| body参数       | 类型     | 是否必传 | 说明          |
| ------------ | ------ | ---- | ----------- |
| loginUserId  | array  | 是    | 登录用户ID字符串数组 |
| register     | number | 否    | 上传用户注册的时间戳  |
| {% endtab %} |        |      |             |

{% tab title="body示例" %}

```java
{
  "loginUserId": ["abcdef", "bcdefg", ...],
  "registerTime": 1514764800000
}
```

{% endtab %}

{% tab title="返回示例" %}
200：OK
{% endtab %}
{% endtabs %}


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