Pass in username from identity server

Hello all,
We are using Okta as an external provider for IdentityServer 4, when the user clicks the “Log in with Okta” button it redirects them to the Okta Login Screen. What the users would like to have to be able to do is not have to type their username 2 times.

is there a way that we can add their username into the request so that it can populate the username field?