Rocket.Chat/server/methods/afterVerifyEmail.js

import { Meteor } from 'meteor/meteor';

import { Users, Roles } from '../../app/models';

Meteor.methods({
	afterVerifyEmail() {
		const userId = Meteor.userId();

		if (!userId) {
			throw new Meteor.Error('error-invalid-user', 'Invalid user', {
				method: 'afterVerifyEmail',
			});
		}

		const user = Users.findOneById(userId);
		if (user && user.emails && Array.isArray(user.emails)) {
			const verifiedEmail = user.emails.find((email) => email.verified);
			const rolesToChangeTo = { anonymous: ['user'] };
			const rolesThatNeedChanges = user.roles.filter((role) => rolesToChangeTo[role]);

			if (rolesThatNeedChanges.length && verifiedEmail) {
				rolesThatNeedChanges.forEach((role) => {
					Roles.addUserRoles(user._id, rolesToChangeTo[role]);
					Roles.removeUserRoles(user._id, role);
				});
			}
		}
	},
});