AppStreamImageArn = t.add_parameter( Parameter( "AppStreamImageArn", Description="ARN of the image from `aws appstream describe-images`", Type="String")) InstanceType = t.add_parameter( Parameter( "InstanceType", Description= "Instance Type to use for Image Builder. Restricted to smaller instances but remove the 'AllowedValues' line to access any instance type", Type="String", AllowedValues=["stream.standard.medium", "stream.standard.large"])) AppStreamStackName = t.add_parameteR( Parameter("AppStreamStackName", Description="Name of the AppStream Stack", Type="String")) AppStreamSettingsGroup = t.add_parameter( Parameter("AppStreamSettingsGroup", Description="Prefix for the Settings group name", Type="String")) AppStreamUserFirstName = t.add_parameter( Parameter("AppStreamUserFirstName", Description="First Name of the New AppStream User", Type="String")) AppStreamUserLastName = t.add_parameter( Parameter("AppStreamUserLastName", Description="Last Name of the New AppStream User",