AddUserHandler handles an http request to add a new User.

AutoLoginUserHandler handles an http request to auto login a user.

JSONToDTO decodes an http request JSON body to a data transfer object.

LoginUserHandler handles an http request to log in a User.

New creates a new App.

ServeInternalError serves a 500 error.

ServeJSON returns a JSON response for an http request.

App is a representation of an App.

OptionalArgs is a representation of all the optional arguments for this application.

Option is a representation of a function that modifies optional arguments.