[X] bug report
[ ] feature request

# Detailed description

The AWS API supports Authorization parameters as GET parameters, e.g. here's a GET request to SendMessage on SQS:

```
curl 'http://localhost:4566/000000000000/SomeQueue.fifo?Action=SendMessage&MessageGroupId=Default&MessageDeduplicationId=1615597859837&MessageBody=%7B%22gateway_id%22%3A%20%2204e73c80-3539-499c-92a4-a0b106c2f6ab%22%7D&X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=test%2F20210313%2Fus-east-1%2Fsqs%2Faws4_request&X-Amz-Date=20210313T011059Z&X-Amz-Expires=86400000&X-Amz-SignedHeaders=host&X-Amz-Signature=2c652c7bc9a3b75579db3d987d1e6dd056f0ac776c1e1d4ec91e2ce84e5ad3ae'
```

## Expected behavior

Should send the message and return receipt information.

## Actual behavior

Returns...

```
<?xml version="1.0" encoding="UTF-8"?>
<Error>
    <Code>NoSuchBucket</Code>
    <Message>The specified bucket does not exist</Message>
    <BucketName>000000000000</BucketName>
    <RequestID>7a62c49f-347e-4fc4-9331-6e8eEXAMPLE</RequestID>
</Error>
```

""" Recursively apply `func` to `obj` (may be a list, dict, or other object). """
    obj = func(obj, path=path)
    if isinstance(obj, list):
        for i in range(len(obj)):
            tmp_path = '%s[%s]' % (path or '.', i)
            obj[i] = recurse_object(obj[i], func, tmp_path)
    elif isinstance(obj, dict):
        for k, v in obj.items():
            tmp_path = '%s%s' % ((path + '.') if path else '', k)
            obj[k] = recurse_object(v, func, tmp_path)
    return obj
def keys_to_lower(obj):
    """ Recursively changes all dict keys to first character lowercase. """
    def fix_keys(o, **kwargs):
        if isinstance(o, dict):
            for k, v in dict(o).items():
                o.pop(k)
                o[first_char_to_lower(k)] = v
        return o
    result = recurse_object(obj, fix_keys)
    return result
def camel_to_snake_case(string):