Add calender support in server

server/models/CalendarUser.js

@@ -0,0 +1,41 @@
+const { DataTypes } = require('sequelize');
+
+module.exports = (sequelize) => {
+  const CalendarUser = sequelize.define('CalendarUser', {
+    id: {
+      type: DataTypes.INTEGER,
+      primaryKey: true,
+      autoIncrement: true
+    },
+    name: {
+      type: DataTypes.STRING,
+      allowNull: false,
+      unique: true
+    },
+    nextcloudUrl: {
+      type: DataTypes.STRING,
+      allowNull: false
+    },
+    username: {
+      type: DataTypes.STRING,
+      allowNull: false
+    },
+    password: {
+      type: DataTypes.STRING,
+      allowNull: false
+    },
+    calendarName: {
+      type: DataTypes.STRING,
+      allowNull: true // Will default to personal calendar if not specified
+    },
+    isActive: {
+      type: DataTypes.BOOLEAN,
+      defaultValue: true
+    }
+  }, {
+    tableName: 'calendar_users',
+    timestamps: true
+  });
+
+  return CalendarUser;
+};