# oauth_server A very simple OAuth identity provider server. The following endpoints are exposed: - `/oauth/auth.html`: An OAuth2 [authorization endpoint](https://openid.net/specs/openid-connect-core-1_0.html#AuthorizationEndpoint). In a proper OAuth2 system, this would prompt the user to log in; we just give a big "Submit" button (and an auth code that can be changed if we want the next step to fail). It redirects back to the calling application with a "code". - `/oauth/token`: An OAuth2 [token endpoint](https://openid.net/specs/openid-connect-core-1_0.html#TokenEndpoint). Receives the code issued by "auth.html" and, if it is valid, exchanges it for an OAuth2 access token. - `/oauth/userinfo`: An OAuth2 [userinfo endpoint](https://openid.net/specs/openid-connect-core-1_0.html#UserInfo). Returns details about the owner of the offered access token. To start the server, do: ```javascript cy.task("startOAuthServer").then((port) => { // now we can configure Synapse or Element to talk to the OAuth2 server. }); ```