With the launch of Social Sign-In, members of your Ning Network no longer need to create a password when joining your Ning Network.
A problem arises when your application prompts the member for their email address and password when generating an access token. Members who have joined your Ning Network using Social Sign-In haven't setup a password yet.
The current workaround is to ask members to setup a password using the profile settings page located at:
We are planning to support 3-legged OAuth, which is the redirection based "Grant permissions to the application" dialogs users are used to already. With that setup, applications will never need to deal with member passwords.