One of our client created a new trail account. After doing the email verification, he tried to login but got the following error:No user with the Username in the SAML Assertion
This is on public cloud.
We can close this thread. I think the issue is the system throws the error if the user tries to login without going through "Go Build Your App' flow. Once the user clicks on build the app button and go through the initialization, subsequent logins work without any issues. Not sure whether the product team needs to look into this to either fix the issue or provide a meaningful error message.