Read now works, and terraform directory contains example code

terraform/provider.tf

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+# All three fields are optional. If omitted, each falls back to an env var,
+# then to a default -- same pattern as config.py in the Python reference
+# project (SWITCH_HOST / SWITCH_HTTPS / SWITCH_PASSWORD):
+#
+#   host     <- HPE1810_HOST     <- "192.168.2.10"
+#   https    <- HPE1810_HTTPS    <- false
+#   password <- HPE1810_PASSWORD <- ""
+#
+# So for the switch as currently configured (no password, plain HTTP, at its
+# default IP), an empty provider block is enough:
+#
+#   provider "hpe1810" {}
+#
+# The explicit values below are just to show what's available.
+
+provider "hpe1810" {
+  host     = "192.168.2.10"
+  https    = false
+  password = "" # switch currently has no password set
+}