Add change email address

Set allow email change in admin panel

models/accountSettings.js

@@ -0,0 +1,33 @@
+AccountSettings = new Mongo.Collection('accountSettings');
+
+AccountSettings.attachSchema(new SimpleSchema({
+  _id: {
+    type: String,
+  },
+  booleanValue: {
+    type: Boolean,
+    optional: true,
+  },
+  sort: {
+    type: Number,
+    decimal: true,
+  },
+}));
+
+AccountSettings.allow({
+  update(userId) {
+    const user = Users.findOne(userId);
+    return user && user.isAdmin;
+  },
+});
+
+if (Meteor.isServer) {
+  Meteor.startup(() => {
+    AccountSettings.upsert({ _id: 'accounts-allowEmailChange' }, {
+      $setOnInsert: {
+        booleanValue: false,
+        sort: 0,
+      },
+    });
+  });
+}