DOC: Update the setup

README_SETUP.md

@@ -16,6 +16,7 @@ package can be accessed by
 ```julia-repl
 julia> ]add "path/to/caosdb-julialib"
 julia> using CaosDB
+julia> connection = CaosDB.Connection.connect() # Enter host, port, path to SSL certificate, and credentials here
 ```
 
 ## Tests