> For the complete documentation index, see [llms.txt](https://docs.tryterra.co/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.tryterra.co/faq/help-topics/data-api-sdk/api-endpoints-errors-and-migrations/token-casing-self-resolved.md).

# Why does Team API create-coach return an invalid token error?

**An invalid-token or region error on Team API create-coach can be caused by incorrect casing in the token.**

* Check the token characters carefully; in one case the leading character needed lowercase casing.
* Verify the token is copied exactly as issued.