Boto3 is the Amazon Web Services (AWS) Software Development Kit (SDK) for Python, which allows Python developers to write software that makes use of Amazon services like S3 and EC2. Boto3 provides an easy-to-use, object-oriented API as well as low-level access to AWS services.
When using Boto3, you might encounter the UnrecognizedClientException error. This error typically manifests when you attempt to make a request to an AWS service, and the service does not recognize the client making the request. The error message usually reads: "The security token included in the request is invalid."
The UnrecognizedClientException is an error code returned by AWS services when the client making the request cannot be authenticated. This typically happens due to issues with the AWS credentials or the configuration of the client.
To resolve the UnrecognizedClientException, follow these steps:
Ensure that your AWS credentials are correct and properly configured. You can check your credentials in the ~/.aws/credentials file or through environment variables. For more information, refer to the Boto3 Configuration Guide.
[default]
aws_access_key_id = YOUR_ACCESS_KEY
aws_secret_access_key = YOUR_SECRET_KEY
If you are using temporary credentials, ensure they have not expired. You can refresh them using the AWS CLI:
aws sts get-session-token
For more details, see the AWS CLI User Guide.
Verify that the region configured in your Boto3 client matches the region of the AWS service you are trying to access. You can set the region in your code as follows:
import boto3
client = boto3.client('s3', region_name='us-west-2')
By ensuring your credentials are correct, not expired, and that your region configuration matches the service endpoint, you can resolve the UnrecognizedClientException error. For further assistance, consult the AWS Security Credentials Documentation.
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