Method not found AmazonCognitoIdentityProviderClient

[TrueGeek]

I'm getting an error of System.MissingMethodException at this line:

var provider = new AmazonCognitoIdentityProviderClient(new AnonymousAWSCredentials(), FallbackRegionFactory.GetRegionEndpoint());

The full error is: Method not found: void Amazon.CognitoIdentityProvider.AmazonCognitoIdentityProviderClient..ctor(Amazon.RegionEndpoint)

I'm on Visual Studio 2019 for Mac.

It does look like a couple other people may be having the same issue.

Since I don't get the dependencies added automatically by the Windows SDK tools and templates I think it may just be that I'm missing something there. I've added AWSSDK.Core. I tried also adding AWSSDK.CognitoIdentity and AWSSDK.CognitoIdentityProvider even though they are already included as dependencies. No luck though.

Obviously the constructor does exist at design time - I can drill down on it in the IDE and see it inside the nuget package. But when I run the code my app will crash if I include any method that has a new AmazonCognitoIdentityProviderClient() inside it.

[klaytaybai]

Hi @TrueGeek, I wasn't able to reproduce your problem. You may have a conflict in your dependencies. Do you have any other references to AWSSDK.CognitoIdentityProvider? Which version are you using? Are you using Xamarin, like the Stack Overflow question example you posted?

[TrueGeek]

I am using Xamarin, yes.

I have references to:

Amazon.Extensions.CognitoAuthentication (1.0.3) AWSSDK.CognitoIdentity (3.3.101) AWSSDK.CognitoIdentityProvider (3.3.103.16) AWSSDK.Core (3.3.103.62)

[FranciscoYimes]

I have the same issue using Android. Did you resolve it?

[TrueGeek]

Haven’t resolved it, but I haven’t had time to look at it either. Work has been keeping me busy this month and this is for a side project.

[shayanaijaz]

Running into the same issue using Xamarin. Did you find a solution?

[keriki101]

I think I found the answer! You need to provide the credentials and RegionalEndPoint inside the var provider = new AmazonCognitoIdentityProviderClient(new AnonymousAWSCredentials(). For example like this

var provider = new AmazonCognitoIdentityProviderClient(new AnonymousAWSCredentials(constants.credentials, constants.RegionalEndpoint);qw

The credentials are what you have declared for Cognito to work

    public static CognitoAWSCredentials credentials = new CognitoAWSCredentials(
        "eu-west-<Your Pool ID>", // Identity pool ID
        RegionEndpoint.EUWest2 // Region
    );

[ashishdhingra]

Hi @TrueGeek,

Good afternoon.

Please let me know if this is still an issue or if it could be closed.

Thanks, Ashish

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