Add user entity

entities/user_entity.cpp

@@ -0,0 +1,21 @@
+#include "user_entity.h"
+
+user_entity::user_entity(const QString &login, const QString &password, UserRole role) {
+    this->_pwd_hash = QCryptographicHash::hash(password.toLocal8Bit(), QCryptographicHash::Sha3_256);
+}
+
+unsigned long long user_entity::id() {
+    return this->_id;
+}
+
+const QString user_entity::login() {
+    return this->_login;
+}
+
+UserRole user_entity::role() {
+    return this->_role;
+}
+
+bool user_entity::verify_password(const QString &password) {
+    return (this->_pwd_hash == QCryptographicHash::hash(password.toLocal8Bit(), QCryptographicHash::Sha3_256));
+}