Reorganized API + added db migrations

Read the README file for more informations

backend/api/users/new.go

@@ -0,0 +1,47 @@
+package users
+
+import (
+	"context"
+	"encoding/json"
+	"log"
+	"net/http"
+
+	core "fr.latosa-escrima/api/core"
+)
+
+func HandleNew(w http.ResponseWriter, r *http.Request) {
+	var user core.User
+	err := json.NewDecoder(r.Body).Decode(&user)
+	if err != nil {
+		core.JSONError{
+			Status:  core.Error,
+			Message: err.Error(),
+		}.Respond(w, http.StatusNotAcceptable)
+		return
+	}
+	log.Println("User : ", user)
+
+	res, err := user.Insert(context.Background())
+	log.Println(res)
+	// if res == nil {
+	// 	core.JSONError{
+	// 		Status:  core.Error,
+	// 		Message: "The user couldn't be inserted.",
+	// 	}.Respond(w, http.StatusNotAcceptable)
+	// 	return
+	// }
+
+	if err != nil {
+		core.JSONError{
+			Status:  core.Error,
+			Message: err.Error(),
+		}.Respond(w, http.StatusInternalServerError)
+		return
+	}
+
+	core.JSONSuccess{
+		Status:  core.Success,
+		Message: "User inserted successfully.",
+		Data:    nil,
+	}.Respond(w, http.StatusCreated)
+}