title: Cognito one User pool with multiple applications
body: <p>I am new to aws and having trouble with cognito login.
  Cognito one user pool with many other applications will use the same login function like in lambda.
  google or fb able to login with the same user pool.
  If the user is not right to access the application, then login process will be failed.
  One user will have right to access many applications.
  Anyone who can help and please advise me how can i implement this solution?
  And login function call from lambda is available for social login too?</p>