.find()

Parameter	Description
Object | String | Number​ | Function	In case of a specific search, use the Object or a Function with the parameters you are looking for in the document

Returns	Description
Object	The data object that was sought
Array	Returns the entire database if an id is not passed in find

​find(<Query>)

// All below works
User.find((obj) => obj._id === 1)
User.find({ _id: 1 })
User.find({ username: "lennart" })
User.find(1)

// {
//   _id: 1, 
//   username: "lennart"
// }

If the id is not passed:

User.find() // [{ _id: 1, username: "lennart" }]