How to Async Base64 Decode in Nim - Code Snippet

# Task: Async Base64 Decode
# Language: Nim

proc async_base64_decode() =
    # Implementation for Async Base64 Decode
    var result = ...; # Initialize variable
    # TODO: Implement core logic here
    # Step 1: Prepare data
    # Step 2: Process Async Base64 Decode
    echo("Done");