Log Groups not found

I understand you're having trouble finding CloudWatch log groups for your Lambda function that interacts with Slack. This issue can occur even when you've added CloudWatch policies with full access. Let's address this step by step:

1. IAM Role Permissions: Ensure that the IAM role associated with your Lambda function has the necessary permissions for CloudWatch Logs. The role should include permissions to create log groups, create log streams, and put log events. These permissions are crucial for Lambda to log output to CloudWatch.

2. Check Lambda Function Configuration: Verify that your Lambda function is configured to send logs to CloudWatch. This should be enabled by default, but it's worth double-checking in the Lambda console.

3. Function Execution: Make sure your Lambda function has been executed at least once. Log groups are typically created only after the first execution of a Lambda function.

4. CloudWatch Console: In the CloudWatch console, navigate to the "Log groups" section. Look for a log group with the name "/aws/lambda/[your-function-name]". If you don't see it, try refreshing the page or adjusting any filters you might have applied.

5. Region Check: Ensure you're looking in the correct AWS region. Log groups are region-specific, so make sure you're in the same region where your Lambda function is deployed.

6. Manual Log Group Creation: If the log group still doesn't appear, you can try creating it manually in the CloudWatch console. Use the format "/aws/lambda/[your-function-name]" for the log group name.

7. CloudWatch Logs Service Limits: In rare cases, you might have hit a service limit for the number of log groups. Check your AWS account limits to ensure this isn't the case.

If after checking these points you still don't see the log groups, there might be an underlying issue with your AWS account or the Lambda function configuration. In this case, it would be best to contact AWS Support for further assistance.

Remember, once the log group is created and your function is logging correctly, you'll be able to view the logs and troubleshoot your Slack API integration more effectively.

Sources
Access to CloudWatch Logs - AWS Lambda
Working with log groups and log streams - Amazon CloudWatch Logs
Searching CloudWatch log groups - AWS Toolkit for VS Code