Beginner here. I just created a new project and am using datomic. I used (start) in the repl and am trying to connect to the database. It says for example to start the http server to use (mount/start #'myproject.core/http-server) which works. The template has the db core in myproj.db.core. I tried to run (mount/start #'myproject.db.core/conn) but that fails with "Unable to resolve var".

which var?