iOS Firebase - Facebook authWithOAuthProvider returns incorrect uid

Question

I am using Facebook login with firebase in my ios app, but I can't save the user's data to the database because authWithOAuthProvider seems to be returning a differend uid string from the one I can see in the dashboard. Is this a known issue? Here is my code:

@IBAction func tappedFacebookLogin(sender: AnyObject) {
    User.sharedModel.facebookUser = true
    let loginManager = FBSDKLoginManager()
    let permissions = ["public_profile", "email"]
    loginManager.logInWithReadPermissions(permissions, fromViewController: self, handler: { fbResult, fbError in
        if fbError != nil {
            // error in login
            print("fbError: \(fbError.code)")
        }
        else if fbResult.isCancelled {
            // cancelled login
            print("cancelled facebook login")
        }
        else {
            // fb logged in
            self.startProgressHud()
            let accessToken = FBSDKAccessToken.currentAccessToken().tokenString
            FirebaseManager.sharedRootRef.authWithOAuthProvider("facebook", token: accessToken, withCompletionBlock: { error, authData in
                if error != nil {
                    self.handleFirebaseError(error)
                }
                else {
                    // firebase logged in
                    print(authData.uid)
                    self.getUserDataAndLogin(authData.uid)
                }
            })
        }
    })
}

Answer 1

发现虽然authWithOAuthProvider打印的uid与auth仪表板中的uid不同， authWithOAuthProvider每次都打印相同的uid，因此保存和检索用户数据实际上是authWithOAuthProvider的，但这只是在auth仪表板中针对该用户出现的一个不同的uid。奇怪的原因。