func handleUserRegistration(c echo.Context) error { username := c.FormValue("username") password := c.FormValue("password") email := c.FormValue("email") // Do something with the submitted data (e.g. create a user) // ... return c.String(http.StatusOK, "User registration successful") } func main() { e := echo.New() e.POST("/register", handleUserRegistration) e.Logger.Fatal(e.Start(":8080")) }In this example, the `handleUserRegistration` function is called when a POST request is made to the `/register` endpoint. It then extracts the submitted form data using the `FormValue` method provided by the Context Form package. The extracted data can then be used to create a user (or perform any other desired action) before returning a response to the client. Overall, the github.com.labstack.echo Context Form package library is a useful tool for handling form submissions in Go web applications.