introduced user registering

src/controllers/authorization/registerController.js

@@ -0,0 +1,56 @@
+import { insertUserModel } from "../../models/authorization/userModel.js";
+import { error400, error409, errorHandler } from "../../utils/errors.js";
+import { sendResponseBadRequest, sendResponseConflict } from "../../utils/responses.js";
+import { noResults } from "../../validators/result-validators.js";
+import mysql from "../../adapters/mysql.js";
+import bcrypt from "bcrypt";
+
+const postRegisterController = (req, res, next, config) => { 
+    const { username, password, email, fk_role} = req.body
+    if (!username || !password) {
+        const err = error400();
+        return sendResponseBadRequest(res, err);
+    }
+    
+    if (!username.match(/^[a-zA-Z0-9]+$/)) {
+        const err = error400();
+        return sendResponseBadRequest(res, err);
+    }
+    
+    const conn = mysql.start(config);
+    
+    return bcrypt
+        .hash(password, config.saltRounds)
+        .then(hashedPassword => {
+            return insertUserModel({ conn, username, password: hashedPassword, email, fk_role }) 
+        })
+        .then((response) => {
+            if (noResults(response)) {
+                const err = error409();
+                return sendResponseConflict(res, err);
+            }
+
+            const result = {
+				_data: {
+					message: 'User created',
+					response
+				}
+			}
+			next(result)
+        })
+        .catch((err) => {
+            if (err.code === 'ER_DUP_ENTRY') {
+                const error = error409();
+                return sendResponseConflict(res, error);
+            }
+            const error = errorHandler(err, config.environment);
+            return res.status(err).json(error);
+        })
+        .finally(() => {
+            mysql.end(conn);
+        });
+}
+
+export {
+    postRegisterController
+}