clustMixType package: find Silhouette value of each cluster

Using the clustMixType package I'm trying to get the silhouette values of the following dataset using the example in page 13 here:

n   <- 10
prb <- 0.99
muk <- 2.5

x1 <- sample(c("A","B"), 2*n, replace = TRUE, prob = c(prb, 1-prb))
x1 <- c(x1, sample(c("A","B"), 2*n, replace = TRUE, prob = c(1-prb, prb)))
x1 <- as.factor(x1)

x2 <- sample(c("A","B"), 2*n, replace = TRUE, prob = c(prb, 1-prb))
x2 <- c(x2, sample(c("A","B"), 2*n, replace = TRUE, prob = c(1-prb, prb)))
x2 <- as.factor(x2)

x3 <- c(rnorm(n, mean = -muk), rnorm(n, mean = muk), rnorm(n, mean = -muk), rnorm(n, mean = muk))
x4 <- c(rnorm(n, mean = -muk), rnorm(n, mean = muk), rnorm(n, mean = -muk), rnorm(n, mean = muk))

x <- data.frame(x1,x2,x3,x4)

The following code plots the mean silhouette value for several k number of clusters:

library(clustMixType)
Essil <- numeric(5)
for(i in 2:6){
  kpres <- kproto(x, k = i,na.rm=FALSE )
  val_sil<-validation_kproto(method = "silhouette", object=kpres)
  Essil[i] <- val_sil
}
plot(1:6, Essil, type = "b", ylab = "Silhouette", xlab = "Number of clusters")
Essil

But now I'm trying to find the silhouette of each cluster, instead of the mean silhouette, is that possible?