Unable to retrieve page content on 401 Response Code

[electroxero]

Describe the bug
I'm trying to fuzz a login page which response with 401, but sqlmap shows an error.

To Reproduce

1. Run 'sqlmap -r /tmp/login_page --ignore-code 401'
2. Use marker (inside JSON post data): yes
3. Parse JSON post data : yes

Screenshots

Running environment:

• sqlmap 1.3.10#stable
• Operating system: arch

[stamparm]

You are pushing it here. No content at all in the first place. I've pushed a patch related to this, but I am not sure that this all will work in the first place.