The password on your Cloud maintenance account may not be the same as the one on your Confluence instance. Invalid credentials really does usually mean "wrong password" or "wrong user id". Have you got into it successfully before, or is this your first usage?
You re certainly right.
I can connect on the maintenance site (https://my.atlassian.com/product).
and see that I've got the license for Atlassian OnDemand (Monthly Payments)
The only way i see to manage users are with the option : Proceed to Site Administration
witch redirect me to my confluance site https://artemys.atlassian.net/login where i coulnd't login.
I succeed login to that site during de trial period.
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