Upload to Backblaze via LiveView Uploads FTW. Thanks for all your help!
to help clarify for others, my_b2_access_key_id
goes first, my_b2_application_key
goes second
:aws_signature.sign_v4_query_params(
"my_b2_access_key_id",
"my_b2_application_key",
"us-east-005",