title: Utilize Address ID in Tennent instance as part of the same post request
body: <p>I am trying to pass the ID of the newly created address as a reference to the Tennent _addressMailing. The addressInstance is supposed to return this ID witch I use in my sequential object creation. I suspect it has something to do with the async handling. </p>
  
  <p>Any help will be appreciated.</p>
  
  <pre><code>const address = new Address({
          fullname: data.fullname,
          street1: data.street,
          street2: data.appartment,
          city: data.city,
          state: data.state,
          zipcode: data.zipcode
          })
  
      const addressInstance = await address.save( (err, address) =&gt; {return address._id} );
  
  const tennent = new Tennent({
      name: data.company,
      subdomain: 'test',
      _addressMailing: addressInstance
  })
  
  const tennentInstance = await tennent.save();
  </code></pre>
  
  <p>console.log(addressInstance)</p>
  
  <p>Console log output: </p>
  
  <pre><code>undefined
  </code></pre>
  
  <p>Database object for tennent:</p>
  
  <pre><code>_id: 5d508d8ff6ea5455f07e106f
  name:"Digi"
  subdomain:"test"
  __v:0
  </code></pre>