add more extensive documentation from hifis
## B2ACCESS
B2ACCESS does not support dynamic client registration and you have to register a
client manually at <https://b2access.eudat.eu/>
-<https://b2access-integration.fz-juelich.de/> or <https://unity.eudat-aai.fz-juelich.de/> (depending on the issuer url). There is documentation
+<https://b2access-integration.fz-juelich.de/> or <https://unity.eudat-aai.fz-juelich.de/> (depending on the issuer url).
+
+There is documentation
on how to do this at <https://eudat.eu/services/userdoc/b2access-service-integration#UserDocumentation-B2ACCESSServiceIntegration-HowtoregisteranOAuthclient>
After the client registration call oidc-gen with the `-m` flag and enter the
required information.
-**Note:** For B2ACCESS `client_id` is equivalent to the client 'username' and
-`client_secret` to the client 'password'
+**Note**: In general for B2ACCESS and UNITY OPs the following information may be
+helpful (depending on the instance you use)
+- `User Name` is the OIDC `client_id` (you can choose it)
+- `Password` is the OIDC `client_secret` (you choose it)
+- `Email Address` is an email address for contacting the admin of the service
+- `Service Security Contact` is the security responsible of the service. This
+ may be additional people, for example in a hosted VM setup
+- `Site Security Contact`is your computer centre security contact. Typically
+ your CERT.
+- Service PP URL: This is your Privacy Policy (PP). Required by law.
+ Find a [PP template here](policies/README.md)
+- The `well_known` configuration of `login` is here:
+```
+<b2access-hostname>/oauth2/.well-known/openid-configuration
+```
