I am facing issue like "SignatureDoesNotMatch" when I try to hit "generate_presigned_url" from Postman

**Error ----------------------------------------------------------------------------------------------: **

<?xml version="1.0" encoding="UTF-8"?> <Error> <Code>SignatureDoesNotMatch</Code> <Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message> <StringToSign>PUT

**Code in Python----------------------------------------------------------------------------------------------: ** import botocore import boto3 import datetime from botocore.exceptions import ClientError import json

s3_file="test6.jpg" def lambda_handler(event, context): # TODO implement print("Step 1") try: s3 = boto3.client('s3') url = s3.generate_presigned_url( ClientMethod='get_object', Params={ 'Bucket': 's3_Bucket', 'Key': s3_file }, ExpiresIn=36000000 )

    result = {'status': 'success', 'data': {'url': url, 'key':s3_file}}
    response = {
        'statusCode': 200,
        'body': json.dumps(result),
        'headers': {
            'Content-Type': 'application/json'
        }
    }
    
except ClientError as e:
    print(f'Error generating presigned URL: {e}')
    return None

return response