Make temporary file path dynamic instead of forcing `/tmp/` (shared hosting compatibility)

[DabrosDKOS]

Hi! 👋
I’ve noticed that in the file
src/Actions/UpdateOrCreateAccount.php
specifically here:
https://github.com/inovector/mixpost/blob/main/src/Actions/UpdateOrCreateAccount.php#L43

the package assumes that the system temporary directory is /tmp/.

On many shared hosting environments (e.g., cPanel, DirectAdmin, dHosting, etc.), access to /tmp/ is restricted by open_basedir.
These environments often provide a custom, user-specific temporary directory such as:

/home/username/.tmp/
/home/username/tmp/

Because the path is hardcoded to /tmp/, Mixpost fails with:

file_put_contents(): open_basedir restriction in effect

💡 Proposal

Would it be possible to make the temporary path dynamic?

For example, use:

sys_get_temp_dir()

or allow setting a custom temp directory via configuration (e.g. an environment variable like MIXPOST_TMP_DIR).

This would greatly improve compatibility with shared-hosting setups where /tmp/ is not writable.

Thanks! 🙌