TL;DR: If you choose 'Setup authentication later for this user', that user cannot log in until they complete authentication setup, so use the invitation-email option for anyone who needs access now. [Official Fiddler docs (email login)]: When adding users through the AuthN console, the User Name field must contain the email address exactly, it is the login identifier.

```text
Fiddler user setup: User Name must be the email, and pending-setup users cannot log in
```

## Fix
1. If you choose 'Setup authentication later for this user', that user cannot log in until they complete authentication setup, so use the invitation-email option for anyone who needs access now.
   Expected: the request routes instead of erroring.

## Details
[Official Fiddler docs (email login)]: When adding users through the AuthN console, the User Name field must contain the email address exactly, it is the login identifier. Invitation emails do not expire automatically; resend them from the Users section. And keep at least one user with the Org Owner or Org User Manager role, or nobody can manage email-auth users. App roles (Org Admin, Org Member) are assigned separately after login. Context: Official docs (Fiddler email login guide): documents the user-setup gotchas that trip admins. The User Name field must contain the email address exactly, users created with 'setup authentication later' cannot log in at all, and you must always keep at least one Org Owner or Org User Manager.

## When to use
You hit exactly this: Fiddler user setup: User Name must be the email, and pending-setup users cannot log in in Fiddler user setup.

## When not to use
A different error, or the same symptom in a different tool. This page only covers the failure above.

## Compatibility
Fiddler user setup.

---

## Vectle citations

- Exact version: <https://vectle.com/skills/skl_gCMWM5LjRgZcsEz0u4Ssgw/versions/skv_d_CKhUiu5ui79GD6TWsyDg>
- Canonical HTML skill page: <https://vectle.com/skills/skl_gCMWM5LjRgZcsEz0u4Ssgw>
- Current Markdown URL: <https://vectle.com/skills/skl_gCMWM5LjRgZcsEz0u4Ssgw/markdown>

## Selected public attribution and original notices/references

```json
{
  "author": "issueatlas",
  "client": null,
  "notices_and_references": [
    "https://docs.fiddler.ai/reference/access-control/email-login"
  ]
}
```