What Auth0 settings are required to enable “Login with Wallet” only?

[Turkchain1919]

I need help enabling the wallet-only login feature so that users can open the Account/User Menu on the explorer.

🔹 What I want to achieve

I want to enable Login → Continue with Wallet
(no email login, no password login — only Web3 login).

Wallet signature popup appears correctly in MetaMask, but after signing:

The loading screen loops

User menu does not open

Backend logs show multiple Auth0–related errors

Web3 users cannot be created in Auth0

🔹 Environment

Blockscout version: 9.0.2

Deployment: Docker Compose (proxy, backend, frontend, stats, visualizer)

Auth0 Tenant Region: US

🔹 Current behavior

When user clicks "Continue with wallet":

Sign-in message is shown correctly in MetaMask

Signature is successful

Browser shows an infinite loading spinner

Backend logs show errors such as:

operation_not_supported

"Cannot set username for connection without requires_username"

"SendGrid not configured"

"Auth0 application id missing"

🔹 Questions for Blockscout team

To use only wallet login, which exact Auth0 settings must be configured?

Which Auth0 connections must be enabled?

Should “Database”, “Email/Passwordless”, or “Social” logins be disabled?

Is “Web3” supported without enabling default username/password database?

Do we need to configure the Auth0 “My Account API” or only the Management API?

Which environment variables are required for wallet-only login?
Examples:

AUTH0_DOMAIN=
AUTH0_CLIENT_ID=
AUTH0_CLIENT_SECRET=
NEXT_PUBLIC_IS_ACCOUNT_SUPPORTED=true

Does Account Abstraction (AA) need to be enabled or can it remain disabled?

Do we need a SendGrid account, or can email features be completely disabled when using only Web3 login?

Does Blockscout automatically create Auth0 users for wallet addresses, or do we need to manually configure a Custom Database or Custom Action in Auth0?

🔹 Logs attached (summaries)

Errors about SendGrid not configured

Errors about Auth0 missing auth0_application_id

Errors about operation_not_supported when creating Web3 users

If needed, I can provide full logs.

🔹 Expected behavior

After signing with wallet:

Blockscout should open the User Menu → Account panel

No email configuration should be required

Thank you

Any guidance or an official step-by-step configuration guide for wallet-only login would be extremely helpful.
Happy to provide additional logs, configs, or access if necessary.