title: Permission error when creating Flutter project
body: <p>I am new to Flutter, and after installing it, I got this error when I tried to create a project.</p>
  
  <pre><code>[hello_world] flutter create --ios-language swift --android-language kotlin .
  Failed to open or create the artifact cache lockfile: "FileSystemException: Cannot open file, path = '/home/raphael/flutter/flutter/bin/cache/lockfile' (OS Error: Permission denied, errno = 13)"
  Please ensure you have permissions to create or open /home/raphael/flutter/flutter/bin/cache/lockfile
  Failed to open or create the lockfile
  exit code 1
  </code></pre>
  
  <p>I can't find any way to fix this, so I'd be glad if someone helps me :)</p>
  
  <p>Thank you!</p>