HKUDS/DeepTutor · error · HTTPException

Username already taken

Error message

Username already taken

What it means

Error "Username already taken" thrown in HKUDS/DeepTutor.

Source

Thrown at deeptutor/api/routers/auth.py:544

        return {
            "ok": True,
            "user_id": result.get("id", ""),
            "username": body.username,
            "role": "user",
            "is_first_user": True,
            "is_admin": False,
        }

    # Standard mode — only allowed before the first admin exists.
    if not is_first_user():
        raise HTTPException(
            status_code=status.HTTP_403_FORBIDDEN,
            detail="Self-registration is closed. Ask an administrator to create your account.",
        )

    existing = {u["username"] for u in list_users()}
    if body.username in existing:
        raise HTTPException(
            status_code=status.HTTP_409_CONFLICT,
            detail="Username already taken",
        )

    add_user(body.username, body.password)
    user_id = ""
    role = "user"
    for item in list_users():
        if item.get("username") == body.username:
            user_id = str(item.get("id") or "")
            role = str(item.get("role") or "user")
            break
    logger.info(f"First user (admin) registered: '{body.username}'")
    return {
        "ok": True,
        "user_id": user_id,
        "username": body.username,
        "role": role,

View on GitHub (pinned to 3e82f13042)

When it happens

Trigger: Thrown at deeptutor/api/routers/auth.py:544 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of HKUDS/DeepTutor@3e82f13042 (2026-08-27). Data as JSON: /api/errors/05f86ecbc3e753f3. Report an issue: GitHub.