Install the login helper
In the community store, search for “OIDC Provider”. Open the result from ganhammar and choose Download or Install. This helper lets you sign in with your existing Home Assistant account.
Does OIDC Provider show as downloaded or installed?
Continue when this step is ready. This keeps your place; it does not verify installation or change anything in your home.
I don’t see that / I need help
If it is not listed, open the store’s Custom repositories option, add https://github.com/ganhammar/hass-oidc-server as an Integration, and search again. Tell me what is on screen if those options differ.