Chore: Scope URLs with account_id (#601)

* Chore: Enable Users to create multiple accounts

Addresses: #402
- migrations to split roles and other attributes from users table
- make changes in code to accommodate this change

Co-authored-by: Pranav Raj Sreepuram <pranavrajs@gmail.com>

app/views/api/v1/accounts/webhooks/create.json.jbuilder

@@ -0,0 +1,5 @@
+json.payload do
+  json.webhook do
+    json.partial! 'webhook', webhook: @webhook
+  end
+end