Changes to Create a sign-in window session

added the new verification_not_applicable enum value to the error/code response property for the response status 422

added the new optional request property clientId

added the new verify enum value to the request property action

removed the phone_required enum value from the error/code response property for the response status 422

removed the rail_requirements_unmet enum value from the error/code response property for the response status 422

endpoint added