# Authentication Authenticate partner applications and users. Obtain a Context Id for use in all other requests. ## Operations - [Authenticate Using User Credentials](https://apidocs.lwolf.com/doc/zipform-api/operation/operation-post-auth-user.md?server_id=server-https-api-pre-zipformplus-com-api) - [Authenticate Using External Id](https://apidocs.lwolf.com/doc/zipform-api/operation/operation-post-auth-external-id.md?server_id=server-https-api-pre-zipformplus-com-api) - [End Session](https://apidocs.lwolf.com/doc/zipform-api/operation/operation-post-auth-end-session.md?server_id=server-https-api-pre-zipformplus-com-api) - [Unlink Account (GET)](https://apidocs.lwolf.com/doc/zipform-api/operation/operation-get-auth-unlink.md?server_id=server-https-api-pre-zipformplus-com-api) - [Unlink Account](https://apidocs.lwolf.com/doc/zipform-api/operation/operation-post-auth-unlink.md?server_id=server-https-api-pre-zipformplus-com-api) [Powered by Bump.sh](https://bump.sh)