> For the complete documentation index, see [llms.txt](https://developers.zortout.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers.zortout.com/partner/authentication.md).
# Authentication
Your platform can connect to ZORT API with several accounts. Your users can login by ZORT account and your platform can retrieve ZORT key (storename, apikey and apisecret) to connect ZORT API.
### Start Development
You will get **"Partner Key"** for using authentication via your email after we approve your application.
### Retrieve Application Key and Application Secret
1. Redirect to Authentication URL with Post method.
```
// Example Form
partnersecretkey :
token :
returnurl :
```
2\. The system will redirect to returnurl after users login successfully with Post method and key parameters. (storename, apikey, apisecret)
## Callback URL
`POST` `{returnurl}`
#### Query Parameters
| Name | Type | Description |
| ---------------------------------------- | ------ | -------------------------- |
| token1\* | String | storename |
| token2\* | String | apikey |
| token3\* | String | apisecret |
| token4 | String | Account name |
| token5\* | String | Your token (reference key) |