The Managed Service Identity Client.
curl \ -H "Authorization: Bearer $ACCESS_TOKEN" \ /providers/Microsoft.ManagedIdentity/operations
curl \
-H "Authorization: Bearer $ACCESS_TOKEN" \
/subscriptions/{subscriptionId}/providers/Microsoft.ManagedIdentity/userAssignedIdentitiescurl \
-H "Authorization: Bearer $ACCESS_TOKEN" \
/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities