add permissions to auth_header = false

[Thovi98]

Problem

• Description of why you made this PR

Solution

• And how do you fix that problem

PR Status

• [ ] Code finished and ready to be reviewed/tested
• [ ] The fix/enhancement were manually tested (if applicable)

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[Thovi98]

superseeded by https://github.com/YunoHost-Apps/audiobookshelf_ynh/pull/79