How do I suggest a username to IDp?

[dev-databee]

My application uses different IDp for different segment of users. We identify the user based on their saml userid.

Is there a way, as a service provider, to suggest a username to laravel-saml2 package that it will pass to IDP for login?

For example, when it is time for login the my app would ask the user for the username they wish to login as. Based on the username we will identify the Saml2 Tenant to be used and then forward the user to the IDP using the saml2 link provided by the package. Is there a way to do this?