Get all Spots owned by the Current User

[Lillith13]

Returns all the spots owned (created) by the current user.

• [x] An authenticated user is required for a successful response
• [x] Successful response includes only spots created by the current user
• [x] Spot data returned includes the id, ownerId, address, city, state, country, lat, lng, name, description, price, createdAt, updatedAt, previewImage, and avgRating

[Lillith13]

• [x] finish adding proper associations and seed data first
• [x] add auth middlewares