diff --git a/api/controllers/lotteryController.js b/api/controllers/lotteryController.js
index f64dbec..dc4a380 100644
--- a/api/controllers/lotteryController.js
+++ b/api/controllers/lotteryController.js
@@ -5,7 +5,7 @@ const allAttendees = (req, res) => {
   const isAdmin = req.isAuthenticated();
 
   return lotteryRepository
-    .allAttendees(isAdmin === "true")
+    .allAttendees(isAdmin)
     .then(attendees =>
       res.send({
         attendees: attendees,
@@ -22,16 +22,113 @@ const allAttendees = (req, res) => {
     });
 };
 
-const deleteAttendees = (req, res) => {
-  return lotteryRepository.deleteAttendees().then(success =>
-    res.send({
-      message: "Removed all attendees",
-      success: success
+const addAttendee = (req, res) => {
+  const { attendee } = req.body;
+
+  const requiredColors = [attendee["red"], attendee["blue"], attendee["green"], attendee["yellow"]];
+  const correctColorsTypes = requiredColors.filter(color => typeof color === "number");
+  if (requiredColors.length !== correctColorsTypes.length) {
+    return res.status(400).send({
+      message: "Incorrect or missing color, required type Number for keys: 'blue', 'red', 'green' & 'yellow'.",
+      success: false
+    });
+  }
+
+  if (typeof attendee["name"] !== "string" && typeof attendee["phoneNumber"] !== "number") {
+    return res.status(400).send({
+      message: "Incorrect or missing attendee keys 'name' or 'phoneNumber'.",
+      success: false
+    });
+  }
+
+  return lotteryRepository
+    .addAttendee(attendee)
+    .then(savedAttendee => {
+      var io = req.app.get("socketio");
+      io.emit("new_attendee", {});
+      return true;
     })
-  );
+    .then(success =>
+      res.send({
+        message: `Successfully added attendee ${attendee.name} to lottery.`,
+        success: success
+      })
+    );
+};
+
+const updateAttendeeById = (req, res) => {
+  const { id } = req.params;
+  const { attendee } = req.body;
+
+  return lotteryRepository
+    .updateAttendeeById(id, attendee)
+    .then(updatedAttendee => {
+      var io = req.app.get("socketio");
+      io.emit("refresh_data", {});
+      return updatedAttendee;
+    })
+    .then(attendee =>
+      res.send({
+        attendee,
+        message: `Updated attendee: ${attendee.name}`,
+        success: true
+      })
+    )
+    .catch(error => {
+      const { statusCode, message } = error;
+
+      return res.status(statusCode || 500).send({
+        message: message || "Unexpected error occured while deleteing attendee by id.",
+        success: false
+      });
+    });
+};
+
+const deleteAttendeeById = (req, res) => {
+  const { id } = req.params;
+
+  return lotteryRepository
+    .deleteAttendeeById(id)
+    .then(removedAttendee => {
+      var io = req.app.get("socketio");
+      io.emit("refresh_data", {});
+      return removedAttendee;
+    })
+    .then(attendee =>
+      res.send({
+        message: `Removed attendee: ${attendee.name}`,
+        success: true
+      })
+    )
+    .catch(error => {
+      const { statusCode, message } = error;
+
+      return res.status(statusCode || 500).send({
+        message: message || "Unexpected error occured while deleteing attendee by id.",
+        success: false
+      });
+    });
+};
+
+const deleteAttendees = (req, res) => {
+  return lotteryRepository
+    .deleteAttendees()
+    .then(removedAttendee => {
+      var io = req.app.get("socketio");
+      io.emit("refresh_data", {});
+    })
+    .then(_ =>
+      res.send({
+        message: "Removed all attendees",
+        success: true
+      })
+    );
 };
 
 module.exports = {
   allAttendees,
+  addAttendee,
+  updateAttendeeById,
+  deleteAttendeeById,
   deleteAttendees
 };
diff --git a/api/lottery.js b/api/lottery.js
index 77547f3..ef78017 100644
--- a/api/lottery.js
+++ b/api/lottery.js
@@ -1,6 +1,16 @@
 const path = require("path");
 const Attendee = require(path.join(__dirname, "/schemas/Attendee"));
 
+class UserNotFound extends Error {
+  constructor(message = "User not found.") {
+    super(message);
+    this.name = "UserNotFound";
+    this.statusCode = 404;
+  }
+
+  // TODO log missing user
+}
+
 const redactAttendeeInfoMapper = attendee => {
   return {
     name: attendee.name,
@@ -20,16 +30,59 @@ const allAttendees = isAdmin => {
   }
 };
 
-const deleteAttendees = () => {
-  const io = req.app.get("socketio");
+const addAttendee = attendee => {
+  const { name, red, blue, green, yellow, phoneNumber } = attendee;
 
-  return Attendee.deleteMany().then(_ => {
-    io.emit("refresh_data", {});
-    return true;
+  let newAttendee = new Attendee({
+    name,
+    red,
+    blue,
+    green,
+    yellow,
+    phoneNumber,
+    winner: false
   });
+
+  return newAttendee.save();
+};
+
+const updateAttendeeById = (id, updateModel) => {
+  return Attendee.findOne({ _id: id }).then(attendee => {
+    if (attendee == null) {
+      throw new UserNotFound();
+    }
+
+    const updatedAttendee = {
+      name: updateModel.name || attendee.name,
+      green: updateModel.green || attendee.green,
+      red: updateModel.red || attendee.red,
+      blue: updateModel.blue || attendee.blue,
+      yellow: updateModel.yellow || attendee.yellow,
+      phoneNumber: updateModel.phoneNumber || attendee.phoneNumber
+    };
+
+    return Attendee.updateOne({ _id: id }, updatedAttendee).then(_ => updatedAttendee);
+  });
+};
+
+const deleteAttendeeById = id => {
+  return Attendee.findOne({ _id: id }).then(attendee => {
+    if (attendee == null) {
+      throw new UserNotFound();
+    }
+
+    return Attendee.deleteOne({ _id: id }).then(_ => attendee);
+  });
+};
+
+const deleteAttendees = () => {
+  return Attendee.deleteMany();
 };
 
 module.exports = {
   allAttendees,
+  addAttendee,
+  updateAttendeeById,
+  deleteAttendeeById,
   deleteAttendees
 };