"Add To Collection" doesn't work when viewing another user's sketch list

[lindapaiste]

p5.js version

No response

What is your operating system?

None

Web browser and version

No response

Actual Behavior

When I click the "Add to Collection" button from another user's sketches page, I see a list of their collections. Clicking on a collection to add or remove a sketch will give a 403 API error because I do not have permission to modify their collections (good).

These are codingtrain's collections, not mine:

The p5 user has no collections:

Expected Behavior

I should see a list of my collections, and be able to add their sketch to my collection.

Steps to reproduce

Steps:

1. Go to https://editor.p5js.org/p5/sketches
2. Click on the 🔻 next to a sketch
3. Click "Add to collection"

[divyansh-prks]

i would like to work on this issue