AWS_AUTH_CREDENTIALS_PROVIDER_IMDS_SOURCE_FAILURE

Question

I'm building an IOS app using Swift on Xcode for a project, and wanted to connect to AWS S3 bucket, list objects, then display content from each individual files. I've AWS CLI settings setting up already: aws configure:
AWS Access Key ID [****************GPMB]:
AWS Secret Access Key [****************2JCF]: 
Default region name [us-east-1]

This is the full error I got from Xcode whenever I tried to connect to S3 using SDK:
crtError(AwsCommonRuntimeKit.CRTError(code: 6153, message: "Valid credentials could not be sourced by the IMDS provider", name: "AWS_AUTH_CREDENTIALS_PROVIDER_IMDS_SOURCE_FAILURE"))

Following is the code:

public class ServiceHandler : ObservableObject {
    private var client: S3Client?
    init() {
        Task(priority: .high) {
            do {
                 client = try S3Client(region: "us-east-2")
            } catch {
                 print(error)
            }
        }
    }
    public func listBucketFiles(bucket: String) async throws -> [String] {
        if let clientInstance = client {
            let input = ListObjectsV2Input(
                bucket: bucket
            )
            let output = try await clientInstance.listObjectsV2(input: input)
            var names: [String] = []
            guard let objList = output.contents else {
                return []
            }    
            for obj in objList {
                if let objName = obj.key {
                    names.append(objName)
                }
            }    
            return names
        } else {
            print("Client has not been initialized!")
            return [String]()
        }
    }
struct ContentView: View {
    @StateObject private var s3 = ServiceHandler()
    var body: some View {
        let tmpStrAry = try await s3.listBucketFiles(bucket: "my_bucket")

---------------------------------------------------------------------------------------------------------------
Let me state my question more specific,
ON https://docs.aws.amazon.com/sdk-for-swift/latest/developer-guide/using-configuration.html#using-custom-configurations
The document states:
By default, AWS SDK for Swift uses a basic default configuration for each AWS service. This configuration automatically looks for credentials to use in a predictable, standard way:
The environment variables AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY_ID, and AWS_SESSION_TOKEN.
The default AWS profile, as described in the AWS configuration file (located at ~/.aws/config on Linux and macOS and at C:\Users\USERNAME\.aws\config on Windows), and the credentials found in the file ~/.aws/credentials on Linux and macOS and in C:\Users\USERNAME\.aws\credentials on Windows.

![](/media/postImages/original/IMGuSzTSHnT_i3gJWKVz2_gw)

Answer

Hello.

This error may occur if the access key cannot be obtained for some reason.  
Does this occur even if I embed the access key directly in the code like below?  
```
public class ServiceHandler: ObservableObject {
    private var client: S3Client?
    
    init() {
        Task(priority: .high) {
            do {
                client = try S3Client(
                    accessKeyId: "your-access-key",
                    secretAccessKey: "your-secret-key",
                    region: "us-east-2"
                )
            } catch {
                print(error)
            }
        }
    }
    
    public func listBucketFiles(bucket: String) async throws -> [String] {
        if let clientInstance = client {
            let input = ListObjectsV2Input(bucket: bucket)
            let output = try await clientInstance.listObjectsV2(input: input)
            var names: [String] = []
            
            guard let objList = output.contents else {
                return []
            }
            
            for obj in objList {
                if let objName = obj.key {
                    names.append(objName)
                }
            }
            
            return names
        } else {
            print("Client has not been initialized!")
            return []
        }
    }
}

struct ContentView: View {
    @StateObject private var s3 = ServiceHandler()
    
    var body: some View {
        let tmpStrAry = try await s3.listBucketFiles(bucket: "my_bucket")
    }
}

```

AWS_AUTH_CREDENTIALS_PROVIDER_IMDS_SOURCE_FAILURE

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