# Configure Basic client in DocCheck Access
... the following steps are required in DocCheck Access:
Reconfigure the login button
- Go to DocCheck Access → select the Login Client → open the “Button Configurator” tab
- Select the desired button size (Small, Medium, or Large) and the button language
Share data with your development team
- Use the “Share Data” button to generate a link containing all relevant information (Login Client ID, Login Client Secret, button code & JavaScript) and share it directly with your developer or agency
Update the button code
- Replace the previous iframe, CReaM button, or legacy code in your system with the new button code and JavaScript from DocCheck Access. Details: Replace the login client implementation
Check OAuth2 adjustments
- In DocCheck Access, even a free Basic client can optionally exchange an authorization code for an access token if you want to use an additional authorization step. Details: Authorization endpoint and Access token endpoint
Next, replace the implementation in your own application. See Changes in your system.