curl -v --data '{ "operation": "GetUserId", "infoField1": "nobody@amazon.com", "infoField2": "nobody" }' -H "host:localhost" -H "content-type:application/json" -H "x-amz-date:20261008T074342Z" -H "authorization:DTA1-HMAC-SHA256 SignedHeaders=content-type;host;x-amz-date, Credential=367caa91-cde5-48f2-91fe-bb95f546e9f0/20261008, Signature=ba03c914fd275fbb57070c4ab33e338df05f686138d251d0b657078c2ed82bca" http://localhost:8000/service/linking