Hello, I'm registered on the MoMo Developer sandbox portal. When I try to create a sandbox API user (POST /v1_0/apiuser) using my Subscription Key from the Collection/Get Paid product, I get the error "401 - Access denied due to invalid subscription key". I confirmed I am subscribed to the product and I am using the Primary Key from my profile. Could you help me understand why this key is not being accepted?
Question
401 Unauthorized invalid subscription key on POST v1_0/apiuser (sandbox)
When creating the apiuser, use the header key “Ocp-Apim-Subscription-Key” with your collection primary key as the value.
Don’t forget to add your callback host in the body: {"providerCallbackHost": "example.com"}
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