refactor(scripts): quotes and spaces

examples/mgmt-add-device.sh

@@ -1,3 +1,7 @@
+#!/bin/bash
+set -e
+set -u
+
 source .env
 
 # 1. (srv) create a new shared key for a given slug
@@ -6,12 +10,14 @@ source .env
 # 4. (dev) use key to connect to remote
 # 5. (dev) ping occasionally
 
-TOKEN=$(go run cmd/signjwt/*.go \
+TOKEN="$(
+    go run cmd/signjwt/*.go \
         --expires-in 1m \
         --vendor-id "$VENDOR_ID" \
         --secret "$RELAY_SECRET" \
         --machine-ppid "$RELAY_SECRET"
-)
+)"
+echo "${TOKEN}"
 
 MGMT_URL=${MGMT_URL:-"http://mgmt.example.com:6468/api"}
 
@@ -19,4 +25,4 @@ CLIENT_SUBJECT=${CLIENT_SUBJECT:-"newbie"}
 curl -X POST "$MGMT_URL/devices" \
     -H "Authorization: Bearer ${TOKEN}" \
     -H "Content-Type: application/json" \
-    -d '{ "slug": "'$CLIENT_SUBJECT'" }'
+    -d '{ "slug": "'"$CLIENT_SUBJECT"'" }'