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  For social sign-in, required attributes such as email will need to be both
  mutable on the User Pool as well as writable on the User Pool Client.
  
  [Learn more about mapping social sign-in provider attributes](https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-pools-specifying-attribute-mapping.html#cognito-user-pools-specifying-attribute-mapping-requirements).

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