Limit what asset types each user has access to

[tecywiz121]

bellhop/bellhop/src/views/types.rs

Line 31 in e153269

// TODO: user user_id_cookie to get only assets you have access to...

Right now all users have access to all asset types. It'd be much better from a usability standpoint if users only see asset types they care about, and it'd be better from a authorization standpoint if users are prevented from reserving assets they shouldn't be.

I'm imagining that this would look like some kind of many-to-many relationship from asset_types to users.