Update

backend/app/models/user.model.js

@@ -0,0 +1,18 @@
+module.exports = mongoose => {
+  let schema = mongoose.Schema({
+      login: String,
+      hashPass: String,     // WARNING: We don't want to send back the hashPass
+      mail: String,
+      role: Object
+    },
+    { timestamps: true }
+  );
+
+  schema.method("toJSON", function() {
+    const { __v, _id, ...object } = this.toObject();
+    object.id = _id;
+    return object;
+  });
+
+  return User = mongoose.model("user", schema);
+};