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

# Authentication

- [Company Authentication](https://docs.tnid.com/authentication/company-authentication.md): Learn how to get your Company TNID client key and secret to authenticate into the GraphQL API.
- [User Authentication](https://docs.tnid.com/authentication/user-authentication.md): Learn how to get your TNID client key and secret to authenticate into the GraphQL API.
- [Refresh Token](https://docs.tnid.com/authentication/refresh-token.md)
- [Accessing via Postman / GraphQL Schema examples](https://docs.tnid.com/authentication/accessing-via-postman-graphql-schema-examples.md)