Let's consider that http://localhost:5000/api/messages/ is the URL for the collection of messages. If we add a number to the preceding URL, we identify a specific message whose id is equal to the specified numeric value. For example, http://localhost:5000/api/messsages/6 identifies the message whose id is equal to 6.
Tip
We want our API to be able to differentiate collections from a single resource of the collection in the URLs. When we refer a collection, we will use a slash (/) as the last character for the URL, as in http://localhost:5000/api/messages/. When we refer to a single resource of the collection we won't use a slash (/) as the last character for the URL, as in http://localhost:5000/api/messages/6.
We have to compose and send an HTTP request with the POST HTTP verb and the http://localhost:5000/api/messages/ request URL to create a new message. In addition, we have to provide the JSON key-value pairs with the field names and...
