Support adding of only Cognito Identity Pool

[desokroshan]

Originally opened by @pai911 https://github.com/awslabs/aws-mobile-appsync-sdk-ios/issues/262

State your question Is it possible to use AWSMobileClient without using Cognito User Pool?

I am migrating from an old Cognito version, so I already set up identity pools for Facebook / Google / Developer Authenticated providers. It works fine with only Identity Pools.

In Amplify, AWSMobileClient seems to be the correct way to do the login, such as the following code snippet. (https://aws-amplify.github.io/docs/ios/authentication)

AWSMobileClient.sharedInstance().federatedSignIn

However, when I tried to use amplify add auth to add auth support, I am always asked to provide information for user pool.

Even if I followed the instruction here, I have to provide information for the Cognito User Pool.

$ cd ./YOUR_PROJECT_FOLDER
$ amplify add auth              ##"amplify update auth" if already configured
❯ Manual Configuration  
❯ User Sign-Up, Sign-In, connected with AWS IAM controls

Environment(please complete the following information):

• AppSync SDK Version: [e.g. 2.6.21] 2.11.0
• Dependency Manager: [e.g. Cocoapods, Carthage] Cocoapods
• Swift Version : [e.g. 4.0] 4.2

Device Information (please complete the following information):

• Device: [e.g. iPhone6, Simulator] iPhone8 Simulator
• iOS Version: [e.g. iOS 11.4] iOS 12
• Specific to simulators:

[kaustavghosh06]

@desokroshan @mlabieniec Is the users use-case to add an existing user pool to the CLI for the Client to use? If so, they can directly add it to their awsconfiguration.json file. Note: The CLI won't overwrite it if there's no auth added through the CLI as well.

[desokroshan]

The use case is to be able to add auth resources via cli without having to add user pools.

[kaustavghosh06]

@desokroshan Like add identity pool without adding user pool?

[kaustavghosh06]

@pai911 Are we understanding your use-case correctly?

[desokroshan]

@desokroshan Like add identity pool without adding user pool?

Exactly

[pai911]

@desokroshan @kaustavghosh06

Yes, in my app, we only use identity pools (Facebook, Google, Developer Authenticated)

However, the current CLI seems to force me to config a user pool.

Currently, is there a way to workaround this?

(After configuring with CLI, delete related user pool config manually)

[kaustavghosh06]

@pai911 We don't have this feature out of the box in the CLI yet, but I'm marking this as an enhancement which we could add to the auth flow.

[JoeShi]

My use case: I am using a third-party user pool. And ONLY want to use identity pool.

[koxon]

+1 important for developer authenticated identities

[a-marcel]

Any news about this feature ? will this come in the near future ?