add simple script to fetch barentwatch token

scripts/get-barentswatch-token.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+
+if [ ! $# -eq 2 ]; then
+    echo "usage: client_id password"
+    exit 1
+fi
+
+client_id="$1"
+password="$2"
+
+curl -X POST \
+    --header "Content-Type: application/x-www-form-urlencoded" \
+    -d "client_id=$client_id&scope=api&client_secret=$password&grant_type=client_credentials" \
+    https://id.barentswatch.no/connect/token
+
+# vim: set filetype=bash: