Fwhich version of zitadel do you use?
FOk, so we just made the API GA with version v.2.58.0, so oyu will have to upgrade
FSo this depends, if you are using our hosted login ui which with oidc standard, this is not possible.
FIf you are building your own login ui using our session api, it is up to you how you build that flow, if you only want to check for the username/email address thats fine, you just need to accept a token with only those checks,
FI am sorry, I missread it. I thought its about the login.
FIts not yet possible to register users with only an email address, at the moment also firstname and lastname are required fields
Fthis will change in the future, as we are working on user schemas, which will allow you to create a schema how your user should look like
Fthe documentation might be alittle confusing there. the password is not requried, but if you send the password object, then you need to fill the password attribtue