diff --git a/docs/ERD/README.md b/docs/ERD/README.md
index 8941052..4ec5bc7 100644
--- a/docs/ERD/README.md
+++ b/docs/ERD/README.md
@@ -72,4 +72,14 @@ flowchart TD
     B --> O{Update account,vessel,otp}
     F --> P{Update metadata}
     G --> P
-```
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+```
+
+### How to bypass OTP for a local install?
+
+You can skip the otp, add json key value to the account preference.
+"email_valid": true
+
+OTP is created and sent by email using a cron. in postgres/cron/job
+accounts are store in signalk/auth/accounts
+you should have an history in signalk/public/process_queue
+By default they are no active as it require external configuration settings.
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