Any way to have user name know email before first login? SAML

Update in case anyone comes across this:

After extensive testing, it appears QB will in fact still send the email before the user has signed in the first time. There was a red herring as when I first tested, as the email did not fire. Since initial testing, the email is firing leading me to believe it was some one time glitch in the matrix on the first test, causing this red herring.