When running the server for the first time (i.e., if the server is
started on a fresh database[^1]), create a default administrator and
print its credentials to standard output.  This is needed so that the
administrator can have one account to login to the server without having
to manually modify the database.

[^1]: The account is created if no other account with the username
`admin` exists.

@@ -149,0 +151,4 @@
+func checkAdminAccount() {
+	defaultId := 0
+	defaultUsername := "admin"
+	defaultPassword := "admin"