- let users choose whether or not they want to use a third-party service.
- Provide an alternate means of access to the service.
- Provide a means of access under the control of the service’s administrators.
- Limit your dependence on a third party, whose policies and technical and sales strategy will undoubtedly change over time.
Set up an account creation procedure by entering or creating a username and password specific to the service.
Check that it is possible to create an account without using a third-party service, by entering or choosing a specific username and password.
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