How to check current user session using AWS Amplify?

Question

I am following along with AWS Amplify documentation and the example code given to check the current auth session is

 func fetchCurrentAuthSession() {
    _ = Amplify.Auth.fetchAuthSession { (result) in
        switch result {
        case .success(let session):
            print("Is user signed in - \(session.isSignedIn)")
        case .failure(let error):
            print("Fetch session failed with error \(error)")
        }
    }
}

after calling this func in a viewDidLoad I get this error Thread 1: Fatal error: Authentication category is not configured. Call Amplify.configure() before using any methods on the category. So I then changed the code to this

      func fetchCurrentAuthSession() {
            do {
                try Amplify.configure()
            _ = Amplify.Auth.fetchAuthSession { (result) in
                switch result {
                case .success(let session):
                    print("Is user signed in - \(session.isSignedIn)")
                case .failure(let error):
                    print("Fetch session failed with error \(error)")
                }
            }
        }catch{

        }

    }

It runs with no errors but the authSession is not printed. What is the proper way to fix this? here is the link to their docs https://docs.amplify.aws/lib/auth/getting-started/q/platform/ios#check-the-current-auth-session

Here is my awsconfiguration.json

{
    "UserAgent": "aws-amplify/cli",
    "Version": "0.1.0",
    "IdentityManager": {
        "Default": {}
    },
    "CredentialsProvider": {
        "CognitoIdentity": {
            "Default": {
                "PoolId": "removed",
                "Region": "removed"
            }
        }
    },
    "CognitoUserPool": {
        "Default": {
            "PoolId": "removed",
            "AppClientId": "removed",
            "AppClientSecret": "removed",
            "Region": "removed"
        }
    },
    "FacebookSignIn": {
        "AppId": "removed",
        "Permissions": "public_profile"
    },
    "Auth": {
        "Default": {
            "authenticationFlowType": "USER_SRP_AUTH"
        }
    }
}

Here is my amplifyconfiguration.json

{
    "UserAgent": "aws-amplify-cli/2.0",
    "Version": "1.0"
}

Answer 1

This is a common error associated with older versions of the Amplify CLI.

1.Update it in the terminal using npm install -g @aws-amplify/cli .

2.Once that is done remove Amplify Auth from the project directory by amplify remove auth.

3.Enter amplify push to configure changes within your backend.

4.Now you can successfully add auth back to your project amplify add auth

5.Enter amplify push to configure changes within your backend.

6.Now run your project and see what happens ;)