If you have configured the workflow to invite developers manually, this covers how to add new developers.
Step 1: Create the new developer account
On the Accounts page of your Admin Portal, create the new account. As an admin, you can skip even some of the required fields. If you want to invite users to the account securely, you can also skip the password fields. However the email on this main admin account must be unique among all users.
Step 2: Set up applications
If you want to pre-configure app keys for the account, you can also add an application on behalf of the developer. Otherwise, leave this as one of the initial steps for the developer to take.
Step 3: Notify the developer
You can either send an email invitation to the developer manually or follow the steps to use the invite developer feature.