> For the complete documentation index, see [llms.txt](https://docs.thryve.health/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.thryve.health/further-resources/v5-api-reference/create-or-get-user.md).

# Create or get user

## Get accessToken of new or existing user

> Retrieve an accessToken for a Thryve user. Automatically creates a user if partnerUserID is empty or no existing user with specified partnerUserID exists.<br>

```json
{"openapi":"3.1.0","info":{"title":"Thryve API","version":"5.0.0"},"servers":[{"url":"https://api.thryve.de"}],"paths":{"/v5/accessToken":{"post":{"summary":"Get accessToken of new or existing user","tags":["End User"],"description":"Retrieve an accessToken for a Thryve user. Automatically creates a user if partnerUserID is empty or no existing user with specified partnerUserID exists.\n","parameters":[{"name":"Authorization","in":"header","required":true,"schema":{"type":"string"},"description":"Basic Auth for your username:password. Required for all endpoints"},{"name":"AppAuthorization","in":"header","required":true,"schema":{"type":"string"},"description":"Basic Auth for your authID:authSecret. Required for all endpoints."}],"requestBody":{"required":true,"content":{"application/x-www-form-urlencoded":{"schema":{"$ref":"#/components/schemas/AccessTokenRequest"}}}},"responses":{"200":{"description":"Request successful. Returns the accessToken of a user.","content":{"text/plain":{"schema":{"$ref":"#/components/schemas/AccessTokenResponse"}}}},"400":{"description":"Error response (invalid parameters, unauthorized, etc.).","content":{"application/json":{"schema":{"$ref":"#/components/schemas/ErrorResponse"}}}}}}}},"components":{"schemas":{"AccessTokenRequest":{"type":"object","properties":{"partnerUserID":{"type":"string","description":"Set this optional parameter to add your an alias to a Thryve user. If no alias is set, it is not possible to retrieve an accessToken/authenticationToken for an existing user. Newer interfaces call this parameter endUserAlias."}}},"AccessTokenResponse":{"type":"string"},"ErrorResponse":{"type":"string"}}}}
```


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