fix: extract common logic (Yelp#208)

detect_secrets/plugins/ibm_cos_hmac.py

@@ -82,6 +82,15 @@ def verify_ibm_cos_hmac_credentials(
     access_key,
     secret_key,
     host='s3.us.cloud-object-storage.appdomain.cloud',
+):
+    response = query_ibm_cos_hmac(access_key, secret_key, host)
+    return response.status_code == 200
+
+
+def query_ibm_cos_hmac(
+    access_key,
+    secret_key,
+    host='s3.us.cloud-object-storage.appdomain.cloud',
 ):
     # Sample code referenced from link below
     # https://cloud.ibm.com/docs/services/cloud-object-storage/api-reference?topic=cloud-object-storage-hmac-signature  # noqa: E501
@@ -149,4 +158,4 @@ def verify_ibm_cos_hmac_credentials(
 
     request = requests.get(request_url, headers=headers)
 
-    return request.status_code == 200
+    return request