Form for direct feedback from users on the app.

There should be a model that can store a user feedback.
`Model UserFeedback: {
    userID, // the id of the user giving the feedback
    feedBackID, // the id of the feedback given
    feedBack content // the feedback content 
}`
Then an api endpoint which should look like the sample below
`http://baseurl/api/v1/feedback` 
with a GET method.