ggplot2 - 'Stacked Bar Chart with Lines'

[RiF]

I have the following (simplied) data:

library(ggplot2)

survey_month<-c("2020-01", "2020-01","2020-01", "2020-01", "2020-01","2020-02", "2020-02", "2020-02","2020-03", "2020-03", "2020-03","2020-04", "2020-04", "2020-04","2020-04", "2020-04", "2020-04","2020-03" )

sport<-c("golf","golf","golf","cricket","football","golf","cricket","football","golf","cricket","football","golf","cricket","football","cricket","cricket","football","golf" )

df <- data.frame(sport,survey_month)

ggplot(data=df,aes(x=survey_month)) + geom_bar(aes(fill=sport),width=0.4)

which gives

I wish to produce a bar chart, similar to this::

With lines between the bars.

Any suggestions on how to do this in R & ggplot?