Soon after launching your web site you will start to receive new user registrations.
By giving someone an account on the web site you are acknowledging them as part of your community - trusting them with access to secured areas and your address book. It is therefore important that you decide on a policy for issuing accounts that is right for your organization.
Some organizations require applicants to have existing members to vouch for them, others give accounts on completion of a short membership course or when joining a cell / small group. To avoid dispute we recommend that you consider at what point an individual is considered a member, and make creating a website account part of that process.