Creates a user on an RStudio templated instance

RStudio has users based on unix user accounts

gce_rstudio_adduser(instance, username, password, admin = TRUE,
  container = "rstudio")

Arguments

instance	An instance with RStudio installed via gce_vm_template
username	The user to create
password	The user password
admin	Default TRUE - Will the user be able to install packages and other sudo tasks?
container	The rstudio container to add the user to

The instance