> For the complete documentation index, see [llms.txt](https://navixy.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://navixy.com/docs/navixy-api/user-api/resources/commons/user/auth.md).

# User authentication code

The second step of multi-factor authentication, verifying or resending the emailed code.

When an account has multi-factor authentication enabled, [`user/auth`](/docs/navixy-api/user-api/resources/commons/user.md#post-user-auth) does not return a usable session. It returns `type: "second_factor_required"` and a limited hash, and emails a code to the address the account registered with.

These two operations finish that exchange: one verifies the code and returns an ordinary session hash, the other sends the code again.

Both require the multi-factor session hash issued part-way through `user/auth`, not an ordinary session hash and not an API key.

## API actions

API base path: `/user/auth/code`.

Operations that list no errors of their own return only the [general error codes](/docs/navixy-api/general/errors.md#error-codes).

***

## Verify auth code

> Complete a multi-factor authentication challenge by submitting the code that was sent to the user.\
> \
> \*\*Requires an MFA session\*\*, which is issued part-way through authentication. An ordinary session hash or API key cannot call this operation.

```json
{"openapi":"3.1.0","info":{"title":"Navixy Platform API","version":"1.0.0"},"tags":[{"name":"Users","description":"Operations for authenticating a user, managing their sessions, reading and updating their settings and personal information, reading audit records, and registering custom applications. All resources under the /user/ path."}],"servers":[{"url":"https://api.eu.navixy.com/v2","description":"Navixy production server on European platform"},{"url":"https://api.us.navixy.com/v2","description":"Navixy production server on American platform"},{"url":"https://api.me.navixy.com/v2","description":"Navixy production server on Middle East platform"}],"security":[{"api_key":[]}],"components":{"securitySchemes":{"api_key":{"type":"apiKey","description":"Either a user session hash or an API key, with the \"NVX \" prefix, for example \"NVX 22eac1c27af4be7b9d04da2ce1af111b\". Obtain a session hash from the userAuth operation, or create an API key from the API keys operations. A small number of operations accept a session hash only and reject an API key with error code 4; each says so in its description.","name":"Authorization","in":"header"}},"responses":{"ResponseError":{"description":"Error response object","content":{"application/json":{"schema":{"type":"object","properties":{"success":{"type":"boolean","description":"Always false."},"status":{"type":"object","description":"Error status. Present only when an error occurred.","properties":{"code":{"type":"integer","description":"An error code in this API, not an HTTP code."},"description":{"type":"string","description":"An error description."}}},"errors":{"type":"array","description":"Per-parameter detail, returned with validation failures such as error code 7. A parameter name here may be an internal field name rather than the documented parameter name.","items":{"type":"object","properties":{"parameter":{"type":"string","description":"Name of the parameter that failed validation."},"error":{"type":"string","description":"What was wrong with it."}}}}}}}}}}},"paths":{"/user/auth/code/verify":{"post":{"tags":["Users"],"summary":"Verify auth code","description":"Complete a multi-factor authentication challenge by submitting the code that was sent to the user.\n\n**Requires an MFA session**, which is issued part-way through authentication. An ordinary session hash or API key cannot call this operation.","operationId":"userAuthCodeVerify","requestBody":{"required":true,"content":{"application/json":{"schema":{"type":"object","properties":{"code":{"type":"string","description":"The verification code sent to the user."}},"required":["code"]}}}},"responses":{"200":{"description":"Authentication completed","content":{"application/json":{"schema":{"type":"object","properties":{"success":{"type":"boolean","description":"`true` if request finished successfully.","readOnly":true},"hash":{"type":"string","description":"Session hash for the authenticated session."}}}}}},"400":{"description":"Bad request. The response body carries the API-level error code in `status.code`. Validation failures also include an `errors` array naming each offending parameter.","$ref":"#/components/responses/ResponseError"},"default":{"$ref":"#/components/responses/ResponseError"}}}}}}
```

#### Errors

These errors come in addition to the [general error codes](/docs/navixy-api/general/errors.md#error-codes):

* 282 - Wrong authentication code.

***

Resending has its own five-minute rate limit, to prevent abuse.

## Resend auth code

> Send the multi-factor authentication code again.\
> \
> \*\*Rate limited to one call every 5 minutes\*\* to prevent abuse.\
> \
> \*\*Requires an MFA session\*\*, which is issued part-way through authentication. An ordinary session hash or API key cannot call this operation.

```json
{"openapi":"3.1.0","info":{"title":"Navixy Platform API","version":"1.0.0"},"tags":[{"name":"Users","description":"Operations for authenticating a user, managing their sessions, reading and updating their settings and personal information, reading audit records, and registering custom applications. All resources under the /user/ path."}],"servers":[{"url":"https://api.eu.navixy.com/v2","description":"Navixy production server on European platform"},{"url":"https://api.us.navixy.com/v2","description":"Navixy production server on American platform"},{"url":"https://api.me.navixy.com/v2","description":"Navixy production server on Middle East platform"}],"security":[{"api_key":[]}],"components":{"securitySchemes":{"api_key":{"type":"apiKey","description":"Either a user session hash or an API key, with the \"NVX \" prefix, for example \"NVX 22eac1c27af4be7b9d04da2ce1af111b\". Obtain a session hash from the userAuth operation, or create an API key from the API keys operations. A small number of operations accept a session hash only and reject an API key with error code 4; each says so in its description.","name":"Authorization","in":"header"}},"responses":{"OK":{"description":"Successful response","content":{"application/json":{"schema":{"type":"object","properties":{"success":{"type":"boolean","description":"`true` if request finished successfully.","readOnly":true}}}}}},"ResponseError":{"description":"Error response object","content":{"application/json":{"schema":{"type":"object","properties":{"success":{"type":"boolean","description":"Always false."},"status":{"type":"object","description":"Error status. Present only when an error occurred.","properties":{"code":{"type":"integer","description":"An error code in this API, not an HTTP code."},"description":{"type":"string","description":"An error description."}}},"errors":{"type":"array","description":"Per-parameter detail, returned with validation failures such as error code 7. A parameter name here may be an internal field name rather than the documented parameter name.","items":{"type":"object","properties":{"parameter":{"type":"string","description":"Name of the parameter that failed validation."},"error":{"type":"string","description":"What was wrong with it."}}}}}}}}}}},"paths":{"/user/auth/code/resend":{"post":{"tags":["Users"],"summary":"Resend auth code","description":"Send the multi-factor authentication code again.\n\n**Rate limited to one call every 5 minutes** to prevent abuse.\n\n**Requires an MFA session**, which is issued part-way through authentication. An ordinary session hash or API key cannot call this operation.","operationId":"userAuthCodeResend","responses":{"200":{"description":"Code resent","$ref":"#/components/responses/OK"},"400":{"description":"Bad request. The response body carries the API-level error code in `status.code`. Validation failures also include an `errors` array naming each offending parameter.","$ref":"#/components/responses/ResponseError"},"default":{"$ref":"#/components/responses/ResponseError"}}}}}}
```


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