运行terraform validate时出现解析错误。如何修复

我已经设置了terraform,并且在运行terraform validate时出现解析错误。如何解决这个问题。

我运行Terraform v0.11.9,在运行Terraform validate时面临解析错误

 provisioner "local-exec" {
    command = "sshpass -f /work/pwdfile.tfvars ssh -o \"StrictHostKeyChecking=no\" -t ${var.username1}@${self.resource_configuration.${var.catalog_name}.ip_address} \"echo $(cat /work/pwdfile.tfvars) | sudo -S yum update -y\""


    }


expected result should pass terraform validate but actual output is 

parse error at 1:117: expected "}" but found invalid sequence "$"